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Atoms and Isotopes By Ryan Goldberg and Jack Lane

Atoms and Isotopes By Ryan Goldberg and Jack Lane. Question 1 - 10. Define an atom. Answer 1 – 10 . The basic unit of a chemical element. Question 1 - 20. Where is most of the mass of an atom located?. Answer 1 – 20 . Nucleus. Question 1 - 30.

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Atoms and Isotopes By Ryan Goldberg and Jack Lane

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  1. Atoms and Isotopes By Ryan Goldberg and Jack Lane

  2. Question 1 - 10 • Define an atom.

  3. Answer 1 – 10 • The basic unit of a chemical element

  4. Question 1 - 20 • Where is most of the mass of an atom located?

  5. Answer 1 – 20 • Nucleus

  6. Question 1 - 30 • Using a cathode ray tube, JJ Thompson discovered what subatomic particle?

  7. Answer 1 – 30 • Electrons

  8. Question 1 - 40 • An element contains atoms with the same number of what subatomic particle?

  9. Answer 1 – 40 • Protons

  10. Question 1 - 50 • What is a molecule?

  11. Answer 1 – 50 • Two or more atoms with a definite arrangement held together by chemical bonds.

  12. Question 2 - 10 • The atomic number of an atom is equal to what?

  13. Answer 2 – 10 • Protons

  14. Question 2 - 20 • Calculate the atomic mass of Oxygen with 10 neutrons.

  15. Answer 2 – 20 • 18

  16. Question 2 - 30 • Element X has an atomic number of 15 and an atomic mass of 37. How many neutrons does element X have?

  17. Answer 2 – 30 • 22

  18. Question 2 - 40 • What is the unit used for measuring the mass of atoms.

  19. Answer 2 – 40 • Atomic mass units (amu)

  20. Question 2 - 50 • What is the atomic number of Calcium? If Calcium has 24 neutrons, what is its atomic mass?

  21. Answer 2 – 50 • The atomic number is 20, and its mass is 44.

  22. Question 3 - 10 • Define an ion.

  23. Answer 3 – 10 • An atom with a net positive or negative charge.

  24. Question 3 - 20 • What is the difference between anions and cations?

  25. Answer 3 – 20 • Anions have a negative charge and cations have a positive charge.

  26. Question 3 - 30 • What two subatomic particles must be equal in order to create a neutral atom?

  27. Answer 3 – 30 • Protons and Electrons

  28. Question 3 - 40 • How many electrons are in S-2?

  29. Answer 3 – 40 • 18 electrons

  30. Question 3 - 50 • Which atom has more electrons? Mg+1 or O-2?

  31. Answer 3 – 50 • Mg+1

  32. Question 4 - 10 • Define isotope

  33. Answer 4 – 10 • Atoms of the same element with different numbers of neutrons resulting in different atomic masses.

  34. Question 4 - 20 • How many neutrons are in a Carbon isotope with a mass of 20?

  35. Answer 4 – 20 • 8 neutrons

  36. Question 4 - 30 • Calculate the average atomic mass of these two Nitrogen isotopes: 95% 14N and 5% 15N.

  37. Answer 4 – 30 • 14.05 amu

  38. Question 4 - 40 • Calculate the average atomic mass of these three isotopes of Oxygen: 78% 16O, 8% 17O, 14% 18O.

  39. Answer 4 – 40 • 16.36 amu

  40. Question 4 - 50 • There are three isotopes of Silicon: 84% 28Si, 10% 29Si, 6% 30Si. A: How many neutrons does each isotope have? B: What is the average atomic mass? (Silicon has an atomic number of 14)

  41. Answer 4 – 50 • A: 1) 14 2) 15 3) 16 • B: 28.22 amu

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