1. 1. How many protons does an beryllium atom have?
C) 9 D)

2. Correct !!
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3. 2. How many electrons does fluorine have?
B) 9
C) 10 D)

4. Correct !!
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5. 3. How many orbitals does the first energy level have?
C) 4
D) 2

6. Correct !!
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7. 4. Electrons have ______________
A) a positive charge.
B) no charge.
C) a negative charge.

8. Correct !!
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9. 5. Which of the following happens when an electron moves to a higher energy level?
A) An electron is lost.
B) The electron has lost energy.
C) An electron is gained.
D) The electron has gained energy.

10. Correct !!
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11. 6. What is the difference between C-12 and C-14?
A) C-14 has two less neutrons than C-12.
B) C-14 has less mass than C-12.
C) C-12 has two less neutrons than C-14.
D) C-14 has two more protons than C-12.

12. Correct !!
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13. 7. Which of the following never changes from one atom of an element to another?
A) the number of neutrons.
B) the number of protons.
C) the mass.

14. Correct !!
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15. 8. The illustration represents which atomic model?
A) Bohr’s Model
B) Dalton’s Model
C) Thompson’s Model
D) The Electron Cloud Model

16. Correct !!
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17. 9. If you know only the number of protons in an element, which of the following can not be positively determined about that element?
A) the number of neutrons.
B) the name of the element
C) the atomic number of the element

18. Correct !!
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19. 10. What is the mass number and atomic number of the element illustrated by the diagram?
A) mass #-12, atomic #-18
B) mass #-18, atomic #-6
C) mass #-12, atomic #-6
D) mass #-6, atomic #-12

20. Correct !!
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21. 11. The difference between a sample of Hydrogen-1 and heavy Hydrogen-2 is
A) the number of protons.
B) the number of neutrons.
C) the number of electrons.
D) none of the above.

22. Correct !!
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23. 12. The region in which an electron is most likely to be found is called
A) the nucleus.
B) an orbital.
C) an isotope.
D) an atom.

24. Correct !!
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