Which element results if 2 protons and 2 neutrons are ejected from a radium nucleus with atomic number 88 and mass number 226 - show workings? What is actually ejected is an alpha particle (helium nucleus). The new atomic number

9,151 results
  1. 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

  2. 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

  3. 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

  4. Chemistry

    Why is an alpha particle written as a helium (He) nucleus? A. An alpha particle has two protons and two neutrons; it is essentially the nucleus of a helium atom. B. Helium is a common element that is often present in small forms; the alpha particle was

  5. 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

  6. 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

  7. science

    Which argument best explains the charge of an atomic nucleus? An atomic nucleus is positively charged because it is composed of neutrons. An atomic nucleus is positively charged because it is composed of protons. An atomic nucleus is negatively charged

  8. 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

  9. 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

  10. 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

  11. Introduction to Physical Science

    If two protons and two neutrons are removed from the nucleus of an oxygen-16 atom, a nucleus of which element remains? It was simple to say that oxygen-16 remains but is there a formula for this. Thank you

  12. 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

  13. Science

    The Composition of Atoms Quick Check questions and answers Science 8 A Unit 3: Matter Interactions A. A model of an atom shows eight electrons in rings that represent different energy levels. How many electrons are in each energy level? 1. four in the

  14. 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

  15. chemistry

    Which of the following statements is true about the nucleus? Only the strong nuclear force holds the nucleus together. The strong nuclear force and the residual strong force hold the nucleus together. The presence of neutrons, the strong nuclear force, and

  16. 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

  17. 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

  18. 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.

  19. 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

  20. Physical science CHECK my answers

    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 the first evidence that

  21. physics

    The number of electrons that move about the nucleus of an electrically neutral atom is the same as the number of ____________________. A) protons in the nucleus.B) quarks in the nucleus.C) protons + neutrons in the nucleus.D) neutrons in the nucleus.E)

  22. 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

  23. science

    HELP ME !!!!!!! What is the atomic number of an atom?(1 point) the number of particles in the nucleus the number of protons the number of neutrons the number of particles outside the nucleus Which statement about an atom is correct?(1 point) The proton has

  24. 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

  25. 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

  26. chem

    describe what happens when a nucleus is stabilized by converting protons into neutrons

  27. 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

  28. 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

  29. Chemistry

    An atom has 98 protons and 151 neutrons. If it undergoes alpha decay, what are the number of protons and neutrons, respectively, in the daughter nucleus?

  30. 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

  31. 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

  32. 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

  33. 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

  34. Physics

    The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particles (helium nuclei, each consisting of 2 protons and 2 neutrons). (a) What is the force between the two alpha particles when they

  35. chemistry

    A magic number is the name given to certain numbers of protons or neutrons that have a high correlation to stability in nuclei. Magic # of protons: 2,8,20,28,50,82 Magic # of neutrons: 2,8,20,38,50,82,126, 184 Using general trends, predict the stability of

  36. chemistry

    A lithium nucleus has three protons and three neutrons. How many electrons would it take to equal the mass of a lithium nucleus?

  37. 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?

  38. Physics

    If two protons and two neutrons are removed from the nucleus of an oxygen-16 atom, a nucleus of which element remains? Carbon 12 will be the answer, but i need to understand the answer. I requested help from a friend but was given the answer and not

  39. PHY science

    Which argument best explains the charge of an atomic nucleus? (1 point) An atomic nucleus is positively charged because it is composed of neutrons * An atomic nucleus is positively charged because it is composed of protons. An atomic nucleus is negatively

  40. Science

    1) What subatomic particles are located in the nucleus and have no effect on the charge of the atom? a) Protons and neutrons b) Electrons c) Neutrons d) Protons 2) The electron can be found in what location of an atom? a) Orbit b) Center c) Attached to

  41. 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

  42. 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

  43. chemistry

    how do you determine if the atom is a neutral atom or an ion and if the atom is an isotope or not? It is neutral if the number of protons in the nucleus = the number of electrons in the outside shells. More or fewer electrons means it is an ion. An isotope

  44. Chemistry

    Identify the element shown below. Group of answer choices Magnesium (Mg) Hydrogen (H) You cannot identify the element, there is not enough information. Helium (He) Calcium (Ca) Flag this Question Question 26.67 pts A student tests an unknown substance for

  45. physics

    What is the charge of a bare Magnesium nucleus (no electrons, just the protons and neutrons) in Coulombs?

  46. chemistry problem

    A carbon nucleus has six protons and six neutrons. How many electrons would it take to equal the mass of a carbon nucleus? ok. i think theres some type of formula or some trick to figure this one out but i don't know what it is. If you guys know how to

  47. Chemistry

    Carbon-12 contains 6 protons and 6 neutrons. The radius of the nucleus is approximately 2.7 (femtometers) and the radius of the atom is approximately 70 (picometers). The volume of the nucleus is 8.2×10^−8 pm^3 And the volume of the atom is 1.4×10^6

  48. 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

  49. Physics

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

  50. S103

    Which element results if 2 protons and 2 neutrons are ejected from a radium nucleus with atomic number 88 and mass number 226 - show workings? What is actually ejected is an alpha particle (helium nucleus). The new atomic number is 88-2 = 86 and the new

  51. 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

  52. 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

  53. 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

  54. 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

  55. 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

  56. 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

  57. 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

  58. physics

    The number of electrons that move about the nucleus of an electrically neutral atom is the same as the number of ____________________. A) protons in the nucleus.B) quarks in the nucleus.C) protons + neutrons in the nucleus.D) neutrons in the nucleus.E)

  59. 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

  60. Physical Science

    Please just help with these few! Also, these are my answers. Which statement accurately describes how electrons are arranged in Bohr's atomic model? electrons travel randomly in the large space outside the nucleus electrons travel around the nucleus in

  61. Chemistry

    I need to write this into its atomic symbol. the isotope with 7 protons and 8 neutrons in its nucleus. I don't really understand it the whole protons and neutrons thing so if you could clear that up for me also it would help. Thanks :D

  62. Physical Science

    An aluminum nucleus has 13 protons and 14 neutrons. A copper nucleus has 29 protons and 34 neutrons. What is the force of repulsion between an aluminum nucleus and a copper nucleus when they are separated by 1.2 nm?

  63. physics

    An aluminum nucleus has 13 protons and 14 neutrons. A copper nucleus has 29 protons and 34 neutrons. What is the force of repulsion between an aluminum nucleus and a copper nucleus when they are separated by 10-9 m?

  64. 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

  65. 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

  66. 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

  67. 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

  68. Science

    What is the atomic number of an atom?(1 point) A. the number of particles outside the nucleus B. the number of particles in the nucleus C. the number of neutrons D. the number of protons Which statement about an atom is correct?(1 point) A. The neutron has

  69. 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

  70. Chemistry

    How would I determine the ratio of neutrons and protons in the nucleus of each atom? 1) He 2protons , 2 neutrons

  71. 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.

  72. 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=)

  73. 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.

  74. Physics

    The nucleus of a certain type of uranium atom contains 92 protons and 143 neutrons. What is the total charge of the nucleus in Coulombs?

  75. Science

    Hi, could someone check my answers? The nucleus of an atom is made of _______. electrons and empty space protons and neutrons** protons and electrons neutrons and electrons Niels Bohr's model of an atom looked like a (n) ___. galaxy solar system** electron

  76. 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?

  77. 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.

  78. Science

    Under conditions of high temperature, two protons could combine to form a deuterium necleus in the following reactions: p + p ----> 2H + e+ + ve + energy Write the equation for this reaction in terms of the nucleons involved by replacing the deuteriu

  79. physical science

    I have been working on my homework for science for a while now and I just wanted to see if I got any questions wrong. Can someone help me by checking what problems i got wrong. My parent told me that I have at least 5 problems wrong. Can someone point them

  80. 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

  81. Physics

    I need help with question one and I need question three to be checked please? 1.How does the mass of a nucleon compare with the mass of an electron? 3.Why do protons in a very large nucleus have a greater chance of flying apart by electrical repulsion? -I

  82. Chemistry

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

  83. chem

    how would you find the answer? A carbon nucleus has six protons and six neutrons. How many electrons would it take to equal the mass of a carbon nucleus?

  84. physics

    For small nuclei, an equal number of protons and neutrons gives rise to a stable nucleus. However, for larger nuclei, an excess of neutrons is required. Using your knowledge of the relevant physics, discuss why additional neutrons make one of these larger

  85. science

    how many elements have more protons in their nucleus than neutrons?

  86. 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

  87. physics

    A moving electron passes near the nucleus of a gold atom, which contains 79 protons and 118 neutrons. At a particular moment the electron is a distance of 7.5 × 10−9 m from the gold nucleus. What is the magnitude of the force exerted by the gold nucleus

  88. physics

    A moving electron passes near the nucleus of a gold atom, which contains 79 protons and 118 neutrons. At a particular moment the electron is a distance of 7.5 × 10−9 m from the gold nucleus. What is the magnitude of the force exerted by the gold nucleus

  89. 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

  90. chemistry

    the particles protons and neutrons present in atomic nucleus are known as......

  91. Science

    Unit 3 Test Multiple Choice Please select the correct response for the following questions. 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)

  92. Physics

    Marie Curie first identified the element radium in 1898. She found that the radium-226 (mass 3.77x10^-25 kg) decays by emitting alpha particle (mass 6.64x10^-27 kg). If the alpha particle's speed is 2.4x10^6 m/s, what is the speed of the recoiling nucleus?

  93. Chemistry

    Is it true that: An isotope has a different number of neutrons than protons in the nucleus of its atom.

  94. science

    How are the atoms of two different elements always similar to each other? A.They react in the same way. B.They have the same number of neutrons. C.Electrons and protons orbit the neutrons. D.Electrons orbit the nucleus.

  95. Chemistry

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

  96. 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

  97. 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

  98. 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

  99. 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

  100. 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

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