Which statement best describes what must occur for two atoms to combine to form a chemical bond? A. The electrons of one nucleus must transfer to the nucleus of the second atom for a chemical bond to form. B. The

39,970 results
  1. Science

    1.Suppose 10 atoms of carbon (C) react with 20 atoms of oxygen (O). According to the Law of Conservation of Matter, how many atoms will there be in the product of this reaction?(1 point) A. 20 B. 30*** C. 10 D. 15 2.Which procedure could be used to

  2. Science

    1.)​CaCO3→CO2​+CaO A scientist heats 30 grams of calcium carbonate (CaCO3) in the chemical reaction shown. What is the total mass of the products?(1 point) A.)10 grams B.)15 grams C.)60 grams

  3. Science

    CHECK MY ANSWERS!!!!!!! 1) Cobalt has a mass number of 59 and an atomic number of 27. A student wants to create a model of a cobalt atom. Which statement about the model is correct?(1 point) A. The model should show 27 protons and 32 neutrons.****** B. The

  4. Science

    First Question: Which statement correctly describes why earthquakes happen? Earth’s crust near magma melts, and the ground collapses. Earth’s crust suddenly slips along a fault. Earth’s crust switches places in a periodic manner. Earth’s crust

  5. Physical Science 10A U4L5

    When iron rusts and forms iron oxide, the iron oxide has more mass than the iron. Which statement correctly explains this observation? The iron atoms in iron oxide have more mass than pure iron. There are more iron atoms in iron oxide than in pure iron.

  6. science--repost for Alexa

    Science CHECK MY ANSWERS!!!!!!! 1) Cobalt has a mass number of 59 and an atomic number of 27. A student wants to create a model of a cobalt atom. Which statement about the model is correct?(1 point) A. The model should show 27 protons and 32

  7. Science

    CHECK MY ANSWERS!!!!!!! 1) Cobalt has a mass number of 59 and an atomic number of 27. A student wants to create a model of a cobalt atom. Which statement about the model is correct?(1 point) A. The model should show 27 protons and 32 neutrons.****** B. The

  8. Science/Chemistry

    Cobalt has a mass number of 59 and an atomic number of 27. A student wants to create a model of a cobalt atom. Which statement about the model is correct? The model should show 27 protons and 32 neutrons. The model should show 27 protons and 27 neutrons.

  9. Science

    1) Which of the following is a chemical change? (1 point) Boiling of water Melting a cube of ice Dissolving 10 grams of salt in water Splitting water into hydrogen and oxygen*** 2) What is the mass of water that results from combining 2.0g of hydrogen with

  10. Science

    Modeling Nuclear Processes Quick Check: Which phrase best describes nuclear fusion? (❌)a series of reactions in which particles from one reaction trigger the next reaction (❌)the spontaneous emission of radiation from an unstable nucleus (✔️)the

  11. Chemistry

    Cl2 reacts with the element Sr to form an ionic compound. Based on periodic properties, identify a molecule, X2, that is likely to to react with Sr in a way similar to how Cl2 reacts with Sr. Justify your choice. *****I think it could be MgCl because Cl2

  12. Science

    Which statement describes the locations of Earths volcanoes? A. They tend to form along plate boundaries. B. They tend to form along the Eastern coasts of continents. C. They tend to form in areas where Earth's crust is thin. D. They tend to form in the

  13. Science

    If a chemical reaction such as photosynthesis begins with 6 atoms of carbon (C), how many atoms of carbon (C) should be in the products? A) 2 atoms of carbon (C) B) 3 atoms of carbon (C) C) 6 atoms of carbon (C)**** D) 12 atoms of carbon (C)

  14. science

    How do catalysts affect a chemical reaction? lose activation energy provide activation energy increase activation energy lower activation energy*** What does the forward arrow in a chemical equation mean? The reaction is reversible. The reaction proceeds

  15. chemistry

    Which statement correctly describes a covalent bond? The atoms' valence electrons combine to form a network of bonds. Valence electrons are transferred from one atom to the other. The atoms' valence electrons are shared between the atoms. All of the atoms'

  16. chemistry

    Which statement best describes what must occur for two atoms to combine to form a chemical bond? A. The electrons of one nucleus must transfer to the nucleus of the second atom for a chemical bond to form. B. The repulsive forces of both nuclei must

  17. Chemistry (The Composition of an Atom)

    In 1808, John Dalton wrote his atomic theory of matter. The following is a list of points from that theory. If it is still considered true today, label it true. If it is not considered true today, label it false. 1)Atoms cannot be subdivided. 2)Atoms

  18. Math

    now write the biconditional for the statement. Remember to use the phrase if and only if to combine the original statement and it's converse. Please help me through this!

  19. Physical science

    What happens when an atom gives up loosely held valence electrons to another atom? A. The two atoms form a mixture. B. A chemical bond forms between the two atoms. C. A chemical compound splits into separate elements. D. The two atoms combine to create an

  20. chemistry

    How many moles of vanadium atoms, V, are needed to combine with 0.725 mol of O atoms to make vanadium pentoxide,V2O5?

  21. science

    The modern atomic model includes electrons orbiting the nucleus. Which of the following parts of Dalton's atomic model was disproved by the discovery of the electron? - Atoms are tiny particles. - Atoms cannot be divided into smaller parts . - Atoms have

  22. Chemistry

    Hi guys. I cannot figure out how to do this question. Can you please do all the working out. Thanks How many moles of Al atoms are needed to combine with 1.58 mol of O atoms to make aluminum oxide, Al2O3?

  23. chemistry

    Consider the following reagents: zinc, copper, mercury (density: 13.6 g/mL), silver nitrate solution, nitric acid solution. a. Given a 500-mL Erlenmeyer flask and a balloon can you combine two or more of the foregoing reagents to initiate a chemical

  24. Chemistry

    Write the chemical formulas for the compounds containing each of the following: a) one calcium atom for every two iodide atoms. b) two nitrogen atoms for every four oxygen atoms. c) one silicon atom for every two oxygen atoms. d) one zinc atom for every

  25. biology

    Nitric acid is a chemical that is used in the production of fertilizers. The chemical formula of nitric acid is HNO3. Which of the following are true for a nitric acid molecule? Select all that apply. It has three oxygen atoms. It has three nitrogen atoms.

  26. Chemistry

    Which of the following are key parts of Dalton's Atomic Theory (Click the 4 that apply)? (1 point) All elements are composed of tiny indivisible particles called atoms*** Atoms of the same element are identical. The atoms of any one element are different

  27. science

    10. Which statement correctly describes both rocks and minerals? (1 point) Rocks are naturally occurring and minerals are not naturally occurring. Rocks only occur as solids and minerals occur as solids, liquids, and gases. Rocks have uniform structures

  28. physical science

    give one word/term for each of the following descriptions. 1.A substance that donates electrons in chemical reaction. 2.The formula showing the simplest whole number ratio in which the atoms combine to form a compound.

  29. Chem

    Which of the following are true regarding balancing chemical equations? A It takes practice in the form of trial and error to balance chemical equations B The law of conservation of matter should be applied by counting the number of atoms of every element

  30. AP CHEMISTRY

    A)In a chemical reaction two gases combine to form a solid. What do you expect for the sign of ΔS? B) For which of the following processes does the entropy of the system increase? (Select all that apply.) -> alignment of iron filings in a magnetic field

  31. science/chemistry

    Dr Bob Although helium atoms do not combine to form He2 molecules. is it true to say that He atoms are weakly attracted to one another from London dispersion forces (induced dipole forces) or is there another force at play? It cant be Hydrogen

  32. science

    IDK these help pls 1. Which of the following is a compound? A. O2 B. NH3 C. H2O+NaCl D. N2 2. What is the difference between compounds and mixtures? A. Compounds contain only one element; mixtures contain two or more elements. B. Compounds contain two or

  33. science

    Given that bromine (Br) is a halogen, what can be inferred as true about bromine? Bromine does not react easily with other atoms. Bromine tends to form anions when in chemical reactions with metals. Bromine has seven electrons and seven protons. Bromine

  34. Science

    Using the periodic table and your knowledge of atomic structure. cobalt (Co) and nickel (Ni) have almost identical atomic mass numbers. Comparing the a typical nickel and cobalt atoms, which statement best describes the atoms? A) Nickel has one more

  35. Biology HELP!

    1. Which of the following correctly identifies the composition of an oxygen atom? (1 point) 8 protons, 8 electrons, and 8 neutrons 6 protons, 6 electrons, and 6 neutrons 8 protons, 6 electrons, and 7 neutrons 6 protons, 6 electrons, and 12 neutrons 2.

  36. Science

    In a molecule of lithium sulfide are two atoms of lithium and one of sulfur. Which statement about lithium sulfide is correct? A. The chemical formula for lithium is LiS2 B. Both lithium and sulfur form positive ions C. The atoms in lithium sulfide are

  37. Earth Science (check answers)

    1. The mass number of an atom is obtained by totaling the number of_____and____. a. electrons and protons b. electron and neutrons c.protons and neutrons d.neutrons and isotopes Is it B? 2. Which of the following statements about the chemical combinations

  38. Science

    Ms. Lewis is a chemist mixing two solutions together. A chemical reaction takes place, and the solution becomes warm. Which statement best describes what has happened? A. Energy has been created in the form of thermal energy B. Energy has been transformed

  39. science

    what causes a chemical bond to form between atoms ?

  40. Chemistry

    In stoichiometry, chemists are mainly concerned with a. types of bonds found in compounds b. energy changes occuring in chemical reactions c. mass relationships in chemical reactions d. speed with which chemical reactions occur i thought c?

  41. Physical science

    What happens when an atom gives up loosely held valence electrons to another atom? A. The two atoms form a mixture. B. A chemical bond forms between the two atoms. C. A chemical compound splits into separate elements. D. The two atoms combine to create an

  42. Science

    Lithium atoms, like hydrogen atoms, have only a single electron in their outer shells, yet lithium atoms do not join together to form Li2 molecules the way hydrogen atoms form H2 molecules. Instead, lithium is a metal with each atom part of a crystal

  43. chem please help

    What characteristic best describes the low entropy associated with solids? A. The atoms in a solid are mostly metals. B. The atoms are held together with strong bonds. C. The atoms are arranged in a rigid structure. D. The solid has a high specific heat

  44. Science

    Which part of the ocean floor is part of the continuous underwater mountain range that circles Earth? B. Mid-ocean ridge Which of the following statements describes the difference between physical and chemical weathering? B. Physical weathering is caused

  45. science,

    Using the periodic table and your knowledge of atomic structure. Cobalt (Co) and nickel (Ni) have almost identical atomic mass numbers. Comparing the typical nickel and cobalt atoms, which statement best describes the atoms? A) Nickel has one more neutron.

  46. Science

    Examine the false statement. Compounds are the smallest unit of an element that occur most commonly in nature. Select the rewording of the statement that is true. Compounds are the smallest unit of an element that occur on the periodic table. Molecules are

  47. Science

    The reactants side of an equation is shown. How many silver atoms should the products side of the equation have after a chemical reaction? 2 A g 2 O ⟶ ? 3 2 1 4 I was thinking 2 but im not sure. A water molecule is made up of two hydrogen (H) atoms and

  48. science

    1. which type of matter, that cannot be broken down into simpler substances, makes up all matter in the universe? 2. elements are made of one kind of ____ 3. which of the following is an element a.water b.air c.gold d. soil 4. elements and compounds are

  49. Earth Science

    Earth Science Origins of the Universe Quick Check ------------------------------------------------------------------------------------- Which describes nuclear fusion? (1 point) A - starts when two atoms slam together, causing the larger atom to split into

  50. Chemistry

    1.00g of oxygen combine with 0.126 g of hydrogen to form H2O. 1.00 g of nitrogen combie with 0.216 g of hydrogen to form ammonia. Predict the weight of oxygen required to combine with 1.00 g nitrogen to form an oxide.

  51. science

    How do you find out the number of atoms in a chemical formula? Count up the number of atoms in the formula. If there is a subscript n after an element sytmbol, there are n or those atoms in the molecule. If there is no subscript, there is only one atom of

  52. Science

    Which factor impacts the possible number of ways in which different atoms can be put together? An atoms inability to share neutrons and protons. The ability of atoms to combine in unlimited ways. An atoms inability to react with all elements the same way.

  53. biology

    Which of the following would occur if cells did not have enzymes? a. Reactions in cells would occur too slowly to sustain life. **** b. Reactions in cells would occur too quickly to sustain life. c. Reactants would not be able to combine cells. d.

  54. science

    radioactive decay occurs when atoms a) lose mass b) join with atoms of another element c) break down to form atoms of another element d) are exposes to chemical weather

  55. biology

    Which of the following is true about the relationship between energy and chemical reactions? Activation energy is required for a chemical reaction to occur. Activitation energy is not necessary in a chemical reaction which releases energy. Chemical bonds

  56. chem

    1.Aqueous solutions of sodium and copper (II) chloride are mixed together. which statement is correct? a. both NaCl and CuS will precipitate from solution b. no precipitate will form c. CuS will precipitate from solution d. NaCl will precipitate from

  57. Physics

    One of the way atoms bond with each other would be through: a) Two atoms will approach and be compressed by external forces b)Two atoms will bond when they have similar chemical properties c) Two atoms with opposite physical properties will bond d)Two

  58. Intro. Chemistry

    Based on the law of definite composition, Dalton proposed that one atom of carbon combines with two atoms of oxygen to always produce CO2. Similarly,he proposed that two atoms of hydrogen combine with one atom of oxygen to give a molecule of H2O.

  59. Science

    Which of the following statements is true?Immersive Reader (7.5 Points) Atoms are made of molecules. b. Atoms can join to form molecules. c. Atoms contain more than one element. d. Some atoms do not have protons.

  60. science

    which of these describes a chemical reaction? a. Atoms are created by elements b. Atoms combine to form elements c. Atoms of two or more elements repel each other d. Atoms of two or more elements bond to each other** I’m not sure but i think it’s D

  61. Chemistry please check

    1. Which of the following would occur as saturated hydrocarbons? alkanes alkenes alkynes cycloalkynes ans: alkanes 2. There are millions of organic compounds but only thousands of inorganic compounds because atoms of elements other than carbon never

  62. chemistry

    Evaluate the statement. Bromine (Br) is a halogen. Given the information in the statement, what can be inferred as true about bromine? bromine tends to form covalent bonds when in a chemical reaction with metals bromine has seven electrons and seven

  63. science

    plz check Radioactive decay occurs when atoms - lose mass - join with atoms of another element*** - break down to form atoms of another element - are exposed to to chemical weathering i think B

  64. Physics

    Three liters of nitrogen combine with 9 L of hydrogen to form 6 L of ammonia. If the molecules of nitrogen and hydrogen have two atoms each, how many atoms of hydrogen and nitrogen are there in one molecule of ammonia? ____ atoms of hydrogen ____ atoms of

  65. Chemistry

    Write the chemical formulas for the compounds containing each of the following: a) one calcium atom for every two iodide atoms. b) two nitrogen atoms for every four oxygen atoms. c) one silicon atom for every two oxygen atoms. d) one zinc atom for every

  66. chemistry

    -Why do most atoms form chemical bonds? -What is the purpose of control in an experiment?

  67. Science

    How Is a compound different from a mixture? it is made of one substance It cannot be made of organic materials It cannot be broken down It cannot be separated by a physical change I don't know This formula shows the chemical reaction that occurs when the

  68. Physical science

    Atoms form ________ bonds. A. physical B. chemical** C. atom D. nuclear

  69. biology

    Allegra is a blockbuster allergy medication that generated over $1.8 billion in global sales in 2004. Allegra, or Fexofenadine, decreases allergy symptoms by inhibiting the action of histamines. Histamines are naturally occurring molecules that are

  70. Chemistry

    How do i list the numbers and types of atoms represented by chemical formulas. Example Fe2O3 The subscipts tell you the number of atoms. For example, in Fe2O3 there are two atoms of Fe and three atoms of O. I don't understand the part about types. Please

  71. science

    is this correct statement After undergoing a chemical reaction substances no longer exist in their original form? If not explain. I think it is correct but then i think this might be the definition for a chemical change ( not reaction )

  72. Science

    1.)Which of the following are chemical changes? A.)Boiling Of Water B.)Melting A Cube of ice C.)Dissolving 10 grams of salt in water D.)Splitting water into hydrogen and oxygen 2) What is the mass of water that results from combining 2.0g of hydrogen with

  73. Science

    The modern atomic model includes electrons orbiting the nucleus. Which of the following parts of Dalton’s atomic model was disproved by the discovery of the electron? A. Atoms are tiny particles. B. Atoms cannot be divided into smaller parts. C. Atoms

  74. science help.. pls help me dr.bob22 or damon

    Sodium Chloride is formed when atoms lose and gain electrons Carbon monoxide is formed when atoms share electrons. In both substances atoms are held together by a(n) is it chemical bond pls help me

  75. chemistry

    In terms of chemical bonds and electrons, what kinds of changes occur between atoms when substances undego chemical reactions?

  76. chemistry

    How do precipitates combine in a solution? Very slowly, if at all. Chemical reactions require that atoms/ions contact each other individually.

  77. Chemistry (Check)

    Fill In the Blank Compounds that are formed when two or more atoms combine to form molecules are called __________. is it diatomic molecule. yes.

  78. Science

    What causes a chemical bond to form between atoms ?

  79. Scientific Literacy

    6) A scientist at a chemical company designs and conducts an experiment to determine if a chemical made by the company is harmful to crops. To do this, he sprays the chemical on three plants he has in the laboratory. None of the plants survive. The

  80. Chemistry

    1.00g of oxygen combine with 0.126 g of hydrogen to form H2O. 1.00 g of nitrogen combie with 0.216 g of hydrogen to form ammonia. Predict the weight of oxygen required to combine with 1.00 g nitrogen to form an oxide.i m a student

  81. CHEMISTRY

    although helium atoms do not combine to form He2 molecules is it fair to say that London dispersion forces (induced dipole forces)are what attract He atoms weakly to one another? The other choices are dipole-induced dipole forces Hydrogen bonding

  82. physics

    Two liters of nitrogen combine with 6 L of hydrogen to form 4 L of ammonia. If the molecules of nitrogen and hydrogen have two atoms each, how many atoms of hydrogen and nitrogen are there in one molecule of ammonia?

  83. chemistry

    I have to draw the QMM of CL2C2. For the Lewis structure i think that the two C ayoms form a triple bond and the Cl atoms form single bonds. Therefore i think that the central C atom hybridizes into sp. if this is correct, my question is how do i know

  84. geography

    Give one mineral for each physical property. Physical properties: (1)It must occur naturally. (2)It must be inorganic. (3)It must be a solid. (4)It must possess an orderly internal structure: that is, its atoms must be arranged in a definite pattern. (5)It

  85. Science

    Multiple Choice 1. Which of the following is a chemical change? (1 point) boiling of water melting a cube of ice dissolving 10 grams of salt in water splitting water into hydrogen and oxygen * 2. What is the mass of water that results from combining 2.0 g

  86. chemistry

    Carbon Dioxide reacts with water in blood plasma to form carbonic acid.Suppose that you are a molecule of carbon dioxide. Describe the chemical reactions that take place when you enter the blood and when you leave the blood. Explain what determines how

  87. SCIENCE

    What is the chemically combined substance of a hydrogen atom and a helium atom. please help me because i really don't know this is confusing really please and thankyou Hydrogen atoms don't normally combine with helium atoms. In fact, helium atoms don't

  88. SCIENCE

    Why do atoms combine to form compounds? Because it would create stablity. Thank you

  89. biology

    I have some questions that relate to table 2.1 which lists the chemical elements that occur naturally in the human body. Similar percentages of these elements are found in most living organisms. a. In what abiotic (non-life) chemical forms are these

  90. Math

    Combine the three simple statements below in a compound sentence of the form . That is, provide a written statement in which you translate this symbolic statement to English. p: the ball is lost q: he will drink wine r: the boy rides the bike

  91. physics

    Three liters of nitrogen combine with 9 L of hydrogen to form 6 L of ammonia. If the molecules of nitrogen and hydrogen have two atoms each, how many atoms of hydrogen and nitrogen are there in one molecule of ammonia? ____ atoms of hydrogen ____ atoms of

  92. Chemistry

    Which statement best describes the balanced chemical equation? KNO3(s) + 34.89 kj—->K+(aq) + NO3-(aq)

  93. chemistry

    I have to draw the QMM of CL2C2. For the Lewis structure i think that the two C atoms form a triple bond and the Cl atoms form single bonds. Cl | C'triple bond'C | Cl Therefore i think that the central C atom hybridizes into sp. if this is correct, my

  94. Chemistry

    In blueprinting, there are to reactions that occur. The first one: Fe^3+ + C204^-2 (oxalate) -> Fe^2+ + CO3 must occur with light. Can the second reaction described by the chemical equation below occur without light? Fe^2+ + Fe (CN)6^-2 -> Fe3[Fe(CN)6]2

  95. Astronomy

    suppose a rock's chemical composition is analyzed and is found to contain 5x more potassium atoms than argon atoms. When did the rock form? (10 million, 100 million, 500 million, 2 billion, or 4.5 billion years ago.)

  96. Science

    Three liters of nitrogen combine with 9 L of hydrogen to form 6 L of ammonia. If the molecules of nitrogen and hydrogen have two atoms each, how many atoms of hydrogen and nitrogen are there in one molecule of ammonia?

  97. Science

    Plz correct me if I'm wrong!! 1) Which of the following is a chemical change? (1 point) Boiling of water Melting a cube of ice Dissolving 10 grams of salt in water Splitting water into hydrogen and oxygen*** 2) What is the mass of water that results from

  98. science

    which statement describes the conditions in which diamonds form? A: They form as water evaporates on the shore of very salty bodies of water. B: They form deep underground, in certain areas that are under a great deal of pressure. C: They form deep

  99. chemistry

    what are some the different types of chemical reactions that occur on a daily basis our lives? wouldnt there be many? eating, taking medications, would emotion be or cause chemical reaction? All of the above. Add breathing. Don't forget the cars we drive,

  100. chemistry

    In the chemical expression, 5 C2H4 : There are __________ molecules of Ethene represented which contain a total of _______ atoms of Hydrogen. Please give both answers in number form with a comma between numbers.

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