Randolph Middle School
Science
Atomic Theory
Place all answers on your answer sheet. Please do NOT write on your test!
1. The term atom developed by the Greeks means ______.
A)very small
B)highly reactive
C)made of many parts
D)indivisible
2. The parts of the atom are called ______.
A)subatomic particles
B)really small stuff
C)nucleus
D)charge
3. Which is the smallest of the subatomic particles?
A)proton
B)neutron
C)electron
D)atom
4. Which has the greatest electrical charge?
A)proton
B)neutron
C)electron
D)protons and electrons have equally strong charges
5. Oxygen has 8 electrons. How many orbital shells does it have?
A)1
B)2
C)3
D)4
6. Magnesium has 12 electrons. How many electrons are in its outer shell?
A)1
B)2
C)3
D)4
7. What is the charge of the electron?
A)positive
B)negative
C)neutral
D)over charged
8. What is the charge of the proton?
A)positive
B)negative
C)neutral
D)overcharged
9. What is the charge of the neutron?
A)positive
B)negative
C)neutral
D)undercharged
(Figure 1)
Questions 10, 11, 12 refer to Figure 1.
10. How many protons does Neon have?
11. How many electrons does Neon have?
12. How many neutrons does Neon have?
13. Elements are listed by ______on the periodic table
A)atomic mass
B)atomic number
C)number of neutrons
D)oxidation number
14. The Noble Gases are ______.
A)the most reactive
B)the least reactive
C)located in group 1
D)located in group 2
15. & 16. List the two particles in the nucleus of an atom.
Match the scientist with his discovery.
17. / Democritus / A / The nucleus is made up of particles called neutrons18. / Bohr / B / Periodic Table
19. / Dalton / C / Electrons move in orbits (shells) around the nucleus in a “cloud” of activity
20. / Rutherford / D / Atom has a dense nucleus surrounded by electrons
21. / Mendeleev / E / Tiny indivisible particles called atoms
22. / Chadwick / F / The atom is a hard, dense sphere
23. Isotopes are atoms of the same element that have different numbers of ______.
A)protons
B)electrons
C)neutrons
D)nuclei
24.How many atoms are in Na3OH2?
Complete the table
Question Number / Number of Protons / Number of Neutrons / Number of Electrons / Atomic Number / Mass Number25 / 6 / 6 / 12
26 / 0 / 1 / 1 / 1
27 / 11 / 11 / 23
28 / 8 / 6 / 6 / 14
29 / 17 / 17 / 35
30 / 12 / 12 / 12
31 / 10 / 9 / 9 / 19