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Can someone explain this to me. Element D has 6 protons and 7 neutrons Element F has 7 protons and 7 nuetrons are the pair isotopes or different elements

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  1. Science

    1. Which of the following best describes an atom? A) protons and electrons grouped together in a random pattern B) protons and electrons grouped together in an alternating pattern C) a core of protons and neutrons surrounded by electrons* D) a core of
  2. physical science

    Can someone explain this to me. Element D has 6 protons and 7 neutrons Element F has 7 protons and 7 nuetrons are the pair isotopes or different elements
  3. Periodic Table

    1. The atomic mass of an element is A. the sum of the protons and neutrons in one atom of the element.** B. twice the number of protons in one atom of the element. C. a ration based on the mass of a carbon-12 atom D. a weighted average of the masses of an
  4. chemistry

    Isotopes (select one or more): are chemicals that react only with protons. for an element have the same chemical properties. are atoms of an element that differ in the number of protons. are atoms of an element that differ in the number of neutrons. for an
  5. chemistry

    1.what is meant by atomic number of an element? 2.the mass number of an element is 18,it contains 7 electrons.what is the number of protons and neutrons in it?what is the atomic number of the element? 3.an element has an atomic number of 11 and its mass
  6. Science help please...

    what element results if two protons and two neutrons are ejected from Radium what element results if two protons and two neutrons are ejected from Radium Look up the atomic number for radium, and subtract two. What element has that number? Radon??? a
  7. Chemistry

    I have to write a bunch of atomic symbol for these isotopes and I don't understand how to I do it. (a) atomic number=53, number of neutrons=79 I looked at the periodic table for 53 so the element is Iodine. So They gave the atomic number and I have the
  8. Science

    Why certain elements bond well while others do not? Which of the three sub-atomic particles(electrons, protons, and neutrons) determines most of the properties of an element and why? How the atom of one element is different from the atom of another
  9. chemistry

    which element has 16 protons, 17 neutrons, and 16 electrons? Look on the periodic table. It is element number 16 since that is the number of protons and electrons. I know sulphur has 16 of each. However, it might be an isotope of sulphur to have 17
  10. Chemistry

    1. An atom has 3 protons, 4 neutrons, and 3 electrons. Use the periodic table to determine which atom would have similar chemical properties to this atom. A)12 protons, 12 neutrons, and 12 electrons B)11 protons, 11 neutrons, and 11 electrons C)10 protons,
  11. Chem

    The atomic numbers and masses must added up on both sides of the equation just as we must have the same number of atoms on each side of an equation when it is balanced. Ejection of a "thing" with 2 protons and 2 nuetrons is a He nucleus which is an alpha
  12. Chemistry

    Element X has 6 protons, 8 neutrons, and 6 electrons. Predict the atomic mass of element X?
  13. 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
  14. EARTH SCIENCE

    1. What measurement best describes the results of a scientific experiment regarding volume? A. 1425 mL B. 5 quarts C. 2 pints D. 125 gallons A? 2. How is the mass number calculated for an element? A. The product of neutrons and protons B. There is no
  15. Chemistry

    18. Explain how the atomic number of an element identifies the element. 19. How can atomic number and mass number be used to find the numbers of protons, electrons, and neutrons? 20. An atom is identified as platinum-195
  16. Chemistry

    How many neutrons in carbon-12 and how did you get yuor answer The atomic number is the number of protons. Look for element number 6 on the periodic table and see carbon. For carbon, there are 6 protons. # protons + # neutrons = mass number 6 + # neutrons
  17. Science

    Use your periodic table of elements. Take any element of your choosing (from period 4 or above) and answer the following questions: What is the element's name and symbol? Is it a metal, nonmetal, or metalloid? Which family does it belong to? How many
  18. Science

    The atomic mass of an element is A. the sum of the protons and electrons in one atom of the element. B. twice the number of protons in one atom of the element. C. a ratio based on the mass of a carbon-12 atom. D. a weighted average of the masses of an
  19. Science-Periodic Table

    describe how to verify the # of electrons in the ion of an element. Can you please correct some of my wordings in here. I don't really get how to explain it. You look at the atomic number which is the same number of protons as electrons; but if there is a
  20. Chem.

    Which defines what element the atom is? a. protons b. neutrons or d. electrons. I think it might be neutrons, but can you verify this?
  21. Chemistry Level A

    I am trying to figure out the number of protons and neutrons in Sodium-24. How would I do that? And how can I figure out what element has 50 protons and 70 neutrons? Thanks for clarifying these questions.
  22. Chem

    Which defines what element the atom is? a. protons b. neutrons or d. electrons. I think it might be neutrons, but can you verify this? AND Would the property "reacts in water" be physical or chemical? Thanks.
  23. Chemistry

    Which of the following statements about isotopes is/are true? a. Because isotopes have different numbers of neutrons, they have different mass numbers. b. because neutrons determine an atom's chemical properties, isotopes of the same element are very
  24. Chemistry

    Atom A- 6 protons, 6 electrons, 7 neutrons Atom D- 6 protons, 6 electrons, 8 neutrons Atom X- 7 protons, 7 electrons, 8 neutrons Atom Z- 8 protons, 8 electrons, 9 neutrons Which two atoms are isotopes of the same element? a. A and D b. A and Z c. X and D
  25. spin of a electron

    I have to know the spin of a electron and what I have in my notes has me confused. 1. If the # of neutrons and # protons of a element are odd the element has a whole spin # (1, 2, 3) examples given: 2 H 11 B 14 N 17 O 33 S 35 Cl (I think those are mass
  26. physical science

    Thanks got through all but one Element P has an atomic number of 92 and atomic mass of 238. Element s has 92 protons and 143 neutrons. atomic number and protons are the same would htese two elements be an isotope or different elements
  27. science

    When a parent radioactive nucleus splits by ejecting an alpha particles (two protons and two netutrons), the remaining nucleus has ____ the original nucleus. a) two protons and two neutrons more than b) two protons more and two neutrons less than c) two
  28. chemistry

    the mass number of an element is 18 it contains 7 electrons what is the number of protons and neutrons in it what is atomic number of an element.
  29. Physical Science

    The nucleus of an atom contains six neutrons and esix protons. The nucleus of a second atom contains six neutrons and five protons. Are they atoms of different elements or isotopes of the same element?
  30. Chemistry

    If an element has 12 protons and 17 neutrons, how many electrons must it have?
  31. chemistryI

    If 2 protons and 2 neutrons are ejected from a radium nucleus with atomic number 88 and mass number 226 which element will be the result? Could someone please tell me how to work this out. Thanks. The atomic number is the count of protons...so if two are
  32. Science

    1. Consider a neutral atom that has 17 electrons A.) how many protons does it have b.) what is it's atomic number c.)which element is it 2. List the following for an atom with 33 protons and 42 neutrons a.) the name of the element b.) the atomic number
  33. Chemistry

    If an element has 12 protons and 17 neutrons, how many electrons does it have? I think the answers twelve but I'm not sure?
  34. Science

    1. Which statement about subatomic particles is NOT true? (1 point) Protons and neutrons have almost the same mass. Protons and electrons have opposite charges. Unlike protons and electrons, neutrons have no charge. Protons and neutrons have the same
  35. Science

    Which symbol correctly represents an element (D) whose atoms contain 15 protons and 20 neutrons? A. 20/15 D B. 15/20 D C. 35/15 D D. 15/35 D C?
  36. Chemistry

    Which symbol correctly represents an element (D) whose atoms contain 15 protons and 20 neutrons? A. 20/15 D B. 15/20 D C. 35/15 D D. 15/35 D C?
  37. Chemistry

    consider a neutral atom with 69 protons and 80 neutrons what is the atomic number of this element
  38. Physics

    What element results if two protons and two neutrons are ejected from a radium nucleus?
  39. Science

    Hi i have a science exam on tuesday and really need some help to see if what im doing is right. The question is - How many electrons, protons and neutrons are in the following: a) Br1- b) Be2+ c) Ne d) P1- e) Fe AND MY ANSWERS ARE: a)35 electrons 35
  40. science

    Hello! I need help with some Science things. 1. Where is a good place to find a picture that describes radioactive decay, fussion and fission/ 4. Scientists use the amount of radioactive isotopes found in rocks and fossils to calculate their ages. This
  41. Science--Help.

    Which of the following is NOT one of the eight most common elements in Earth’s continental crust? carbon silicon oxygen aluminum The most abundant element in Earth’s continental crust (by weight) is _____. 2. oxygen silicon calcium iron 3. The central
  42. chem

    what is the symbol for the element that has 78 protons 76 electrons 117 neutrons and a +2 net charge? i thought it was ^195Os^+2 but that is wrong. Thanks for the help!
  43. Chemistry

    How to solve this: One isotope of a metallic element has mass # of 65 and 35 neutrons in nucleus. The cation derived from the isotope has 28 electrons. Write the symbol for this cation. Would the symbol be Cu? because Atomic # = protons = electrons and
  44. chemistry

    An element has an ion with +2 charge.It has 38 electrons and 51 neutrons. write the nuclear symbol for the element.
  45. chm

    If a neutral element has 8 neutrons and 7 electrons, which expression correctly identifies the element?
  46. science

    How do two isotopes of the same element compare with each other? A.They have the same number of protons but a different number of electrons. B.They have the same mass number but a different number of protons. C.They have the same mass number but a
  47. science

    How do two isotopes of the same element compare with each other? A.They have the same number of protons but a different number of electrons. B.They have the same mass number but a different number of protons. C.They have the same mass number but a
  48. Physics HELP!

    You are at the controls of a particle accelerator, sending a beam of 3.90×10^7 m/s protons (mass m ) at a gas target of an unknown element. Your detector tells you that some protons bounce straight back after a collision with one of the nuclei of the
  49. science

    5. Which statement accurately describes the atoms of a specific element? A zinc‚ Zn‚ atom contains 30 protons inside the nucleus and 30 electrons outside the nucleus. A scandium‚ Sc‚ atom contains 45 electrons outside the nucleus and 21 neutrons
  50. science

    5. Which statement accurately describes the atoms of a specific element? A zinc‚ Zn‚ atom contains 30 protons inside the nucleus and 30 electrons outside the nucleus. A scandium‚ Sc‚ atom contains 45 electrons outside the nucleus and 21 neutrons
  51. computer science

    Write a method printBackwards that prints an array of integers in reverse order, in the following format. For the array {1, -3, 4, 7, 2}: element [4] is 2 element [3] is 7 element [2] is 4 element [1] is -3 element [0] is 1
  52. scienece

    The atoms of a certain element contain 11 protons and 1 valence electron.witch statement corectly identifies this element describe its chemical activity
  53. Final Exam- Honors Physical Science

    how can you determine the number of protons, electrons,neutrons, atomic number, and the atomic mass of an element using the periodic table? Atomic mass is given in the table, as well as the atomic number and atomic mass number. Atomic number is the number
  54. earth science

    An atom of element A has 75 protons. What would the element's atomic number be?
  55. physics-mechanics-collisions,momentum, impulse

    You are at the controls of a particle accelerator, sending a beam of 2.40×107 protons (mass ) at a gas target of an unknown element. Your detector tells you that some protons bounce straight back after a collision with one of the nuclei of the unknown
  56. Science

    Each element has a different set of energy levels. Use this fact to explain why the colour of the light emitted by an element in the gaseous state is characteristic of the element? I will be happy to critique your thinking on this.
  57. science

    list three differences between ions and isotopes? An ion is an atom that has at least one fewer electrons than it has protons. Thus, an ion always has positive charge. Hydrogen usually has one proton and one electron and has neutral charge. The hydrogen
  58. Biology

    Element R and Element Q have the same number of valence electrons. These elements both have similar chemical behavior, but Element R has fewer energy levels than Element Q.
  59. science

    Which of the following statements about elements is false? A. An element is a pure substance. B. An element is made up of compounds. C. An element is represented by chemical symbol D. Each element has its own atomic number.
  60. chemistry:energy level of element

    each element has a different has a different set of energy level use this fact to explain why colour of light emited by an element in gaseous state is the characteristics of the element The light emitted is characteristic of a specific set of allowed
  61. Geometry

    If 3 us an element of A and 3 is not an element of B, then which of the following is NOT true 3 is an element of B complement 3 is an element of A union B 3 is an element of A intersect B
  62. chemisrty

    which element results if 2 protons and 2 neutrons are ejected from a radium nucleus with atomic num 88 and mass num 226 how do i go about this please can you help If you can add you can do these. 88Ra226 ==>2X4 + zzYww. Now make the numbers add. Protons
  63. Check my answers, Physical science

    my answer has the **** 1. What is the smallest part of all matter called? (1 point) * a. Element b. Atom***** c. Molecule d. Compound 2. Which of the subatomic particles is negative? (1 point) a. Nucleus b. Neutron c. Proton d. Electron*** 3. Who provided
  64. CHECK answers science

    my answer has the **** 1. What is the smallest part of all matter called? (1 point) * a. Element b. Atom***** c. Molecule d. Compound 2. Which of the subatomic particles is negative? (1 point) a. Nucleus b. Neutron c. Proton d. Electron*** 3. Who provided
  65. chemistry

    How much energy in MeV is released to form one atom of 87Rb from protons, electrons, and neutrons if the nucleus has a mass of 86.909187 amu? The masses of the proton, electron and neutron are 1.00728 amu, 0.000549 amu and 1.00867 amu, respectively.
  66. Chemistry

    Element X has the highest first electron affinity in its period; the ground state electron configuration of it's most common ion is [Kr] 5s^2 4d^10 5p^6 a Element Y is the second largest element in it's period; it's valence electrons are in orbital(s) that
  67. chemistry help!!! (clueless)

    how do i find the mass number of chemicals I would think that you would add up the components masses (molecular masses [from periodic table) that make up the chemical... like...HCl (H= 1.008g/mol, Cl= 35.45g/mol) added= 36.458g/mol hope this helps=)
  68. Science

    Which statement about subatomic particles is NOT true? A.) Protons and neutrons have almost the same mass. B.) Protons and electrons have opposite charges. C.) Unlike protons and electrons, neutrons have no charge. D.) Protons and neutrons have the same
  69. chemistry

    Which of the following statements about protons are false? (Select all that apply.) 1)Protons have twice the mass of neutrons. 2)Protons have a much greater mass than electrons. 3)Protons have about the same mass as neutrons. 4)Some atoms do not have any
  70. science,

    1. How many periods are there in the periodic table? * 1 point 6 7 8 9 2. How many groups are there in the periodic table? * 1 point 15 16 17 18 3. State the number of valence electrons in an atom of Sulfur. * 1 point 2 4 6 8 4. State the number of valence
  71. physics

    hello, does the density of an element have anything to do with the number of elections? i have to work with a partner and his reasoning is this: "the higher the atomic number, the greater the density because the atomic number is made up of protons so the
  72. physics

    hello, does the density of an element have anything to do with the number of elections? i have to work with a partner and his reasoning is this: "the higher the atomic number, the greater the density because the atomic number is made up of protons so the
  73. Dr. Bob, help please

    does the density of an element have anything to do with the number of elections? i have to work with a partner and his reasoning is this: "the higher the atomic number, the greater the density because the atomic number is made up of protons so the more
  74. Biology

    Compared to atoms of the same element, isotopes have different A. numbers of neutrons. B. numbers of protons. (C. types of subatomic particles.) D. numbers of electrons.
  75. Biology

    Carbon is a an element with an atomic number of 6. Based on this information, which of the following statements is true? A. Carbon can be broken down into simpler component substances. B. Each carbon atom will always have 6 protons. C. Each carbon atom
  76. Chemistry

    write isotpoic symbols of the form X-A (for example, C-13) for each of the following isotopes. **Do I add the number of protons and neutrons together to get the answer? The symbol is easy to figure out.** a) the iodine isotope with 74 neutrons B) the
  77. Elements

    Which elements result if two protons and two neutrons are ejected from a radium nucleus with atomic number 88 and mass number 226? What element is atomic number 86 and mass 222? Sorry, should be atomic number 88. Huh? It ejected two protons, changing the
  78. Science

    I'm struggling on science, too. What is the element used for? There are more than 100 elements. To which element do you refer? Which element? Please read the fowwowing site: http://en.wikipedia.org/wiki/Chemical_element alminum. http://www.webelements.com/
  79. Chem

    so I have a set of fill in the blanks for symbol, atomic number, mass number, protons, neutrons electrons and charge. Protons: 6 Neutrons: 8 Electrons: 2 I said the atomic number was 6, the mass number was 12, and the charge was +4. The only thing I was
  80. Physics check

    A Thorium-232 absorbs a neutron and the resulting nucleus undergoes two successive beta decays. The nucleus that results has.... nucleons,.....protons, and .... neutrons. This is a nucleus belonging to the element ....... have no idea
  81. chemistry

    Which of the following has the greatest effect on the properties of an element? A. the number of ions B. the number of protons C. the number of neutrons D. the number of electrons
  82. Chemistry

    one of the tin isotopes has 50 protons and 63 neutrons. another isotope of tin might have a)50 protons and 0 neutrons b)50 protons and 62 neutrons c)49 protons and 63 neutrons d)63 protons and 63 neutrons e)63 protons and 50 neutrons
  83. 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.
  84. science.

    Protons are positively charged and repel other protons. Which other particle is found in the nucleus and separates protons so that the strong force can hold the nucleus together? A) electrons B) neutrons C) protons D) quarks please help cause i'm genuinely
  85. SCIENCE

    How do you figure out the following ..?::::: Mass Number Number of Protons Number of Electrons (OF A ELEMENT) Number of Neutrons Thanks ~ Courtneeeey (:
  86. chemistry

    X is an element with mass number 13 and atomic number 6 whAt is element x? How many protons does x has? What is it newton?
  87. Science-Periodic Table

    whats the connection/relationship between the # of protons in the nucleus of an atom & and atomic # of the element? The atomic number tells you the number of protons in the nucleus of the atom. The atomic number is the number of protons in the nucleus of
  88. Science

    Can an element be separated from a compound? Can an element form a compound? The reaction of zinc metal and hydrochloric acid creates hydrogen gas, an element. if we create this element in a tube what property of this element requires us to keep the tube
  89. Chemistry

    What information is needed to calculate the average atomic mass of an element? A. The relative abundance of its isotope** B. The charge on each isotope C. The total amount of the element in the sample or in nature D. The number of protons in each isotope
  90. Chemisty

    Answer the questions below for an element that has the electron configuration 1s2 2s2 2p6 3s2 3p3. A. What is the symbol for this element? B. What is the atomic number of this element? C. How many unpaired electrons does an atom of this elelemt have? D.
  91. Chemisrty

    Answer the questions below for an element that has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s1. A. What is the symbol for this element? B. What is the atomic number of this element? C. How many unpaired electrons does an atom of this elelemt have?
  92. Engineering

    A plane element is subjected to a shear stress τ = 360MPa which results to a shear strain σ = 0.008rad. a) determine the shear modulus G of the element b)What is the horizontal displacement, d, of the element if te height of the element is equal to 50mm
  93. Chemistry

    I would really appreciate help with the following, as I don't understand how to work it. Thank you in advance for explaining it to me. The mass number (A) of a nuclide is equal to the number of --- blank --- in one of its nuclei. There are 4 answers to
  94. Chem help

    Answer the questions below for an element that has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s1. A. What is the symbol for this element? B. What is the atomic number of this element? C. How many unpaired electrons does an atom of this elelemt have?
  95. chemistry

    name the elementwhich has the following numbers of particles: a.26 electrons,29 neutrons,26 protons b.53 protons,74neutrons c.2electrons(neutral atom) d.20 protons e.86electrons,125neutrons,82protons(charged atom) f.0 neutrons
  96. science

    1. When Mendeleyev arranged the elements into the periodic table, he found that elements with fell into groups on the table A. the same mass B. similar size C. Similar properties D. The same color 2. Every element has its own atomic number. The atomic
  97. Kelsie

    name the element wsith the atomic number z= 15 and the atomic mass number 31. How many electrons does the neutral of this lement have? How many neutrons does the neutral atoms of this element have? I know the element with the atomic number of 15 and atomic
  98. CHEMISTRY

    WHEN A 50.0g SAMPLE OF AN ELEMENT COMBINES COMPLETELY WITH ANOTHER ELEMENT TO MAKE 78.4g OF A COMPOUND. WHAT MASS OF THE SECOND ELEMENT REACTED? HOW TO i SOLVE THIS PROBLEM?
  99. abdul kabir

    the half life of an element is 5 days. if we have 10gram of the element initially. what is the mass of the element after 5days and 10days
  100. chemistry

    26. The first five successive ionisation energies of an element are 0.807, 2.433, 3.666, 25.033, 32.834 MJ mol–1 . Which one element from those listed below could this element be? •(A) B (B) C (C) N (D) O (E) F

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