1. Atomic Structure Test Review

2. 1. Describe the charge of each of the three subatomic particles.
Proton + Neutron is neutral Electron –(neg)

3. 2. Tell whether each of the subatomic particles is inside or outside the nucleus.
Protons and neutrons in nucleus.
Electrons outside nucleus.

4. 3. Which of the subatomic particles contribute to the atom’s mass?
Protons and Neutrons

5. 4. Which subatomic particle has almost no mass?
Electron

6. 5. The number of what subatomic particle in atoms of the same element never changes?
Protons

7. 6. Which two subatomic particles can have different numbers even in atoms of the same element?
Neutrons and Electrons

8. 11. What tells you the exact number protons in an atom?
The Atomic Number

9. 12. If an atom has no charge (neutral), the number of which particles must be equal?
Protons and electrons

10. 13. The number of _______ of an atom determines which element it is.
Protons

11. 14. If an element has 15 protons, how many neutrons does it have?
The element would be Phosphorus
Mass #
- Atomic # -15
= Neutrons 16

12. 15. If an element has an atomic mass of 200
15. If an element has an atomic mass of , what is the mass number?
201

13. 16. If an element has 28 protons and a mass of 58
16. If an element has 28 protons and a mass of 58.69, what is the atomic number?
28 same as protons

14. 17. If an element with 54 electrons is neutral, what is the atomic symbol?Xe

15. 19. The ______ _______ is an average mass for that atom.
Atomic mass

16. 20. The mass number is the rounded off ______ ________.
Atomic mass

17. 21. The mass number can be determined by adding the ______ and ______.
Protons and Neutrons

18. 22. Which element has a mass of 106.42?
Palladium

19. 24. What surrounds the nucleus and each hold one or more electrons?
Energy Levels

20. 25. Where is almost all the mass of the atom contained?
Nucleus

21. 27. Which element in the carbon family has 41 neutrons?
Mass #
Atomic # - 32
= Neutrons 41 Ge

22. 28. Which element has 17 electrons?Cl

23. 29. Draw a carbon atom. Label the protons, neutrons, electrons, nucleus, and energy levels.

25. 30. To find the atomic number of the atom in #29 you would count the _______.
Protons

26. 31. What is the charge of just the nucleus of an atom?
Positive

27. 32. What subatomic particle do you count to determine what the element is?
Protons

28. 34. Atoms of different elements will have different numbers of protons.

29. 36. In a neutral atom, the number of electrons is equal to the number of protons.

30. 37. What is a valence electron?
Electron in the outermost energy level

31. 38. Which two particles give you most of your mass?
Protons and neutrons