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Unit 2: Atoms and the Periodic Table
Quiz 2.1 Practice Questions
Date:
Directions: Answer all questions. Use your notes if you need to. This will help you prepare for tomorrow’s quiz!
1. What does the term divisible mean when talking
about atoms?
a. Divisible means that you can break the atom
into smaller pieces or parts.
b. Divisible means that you cannot break the
atom into smaller pieces or parts.
2. Why was Democritus’ model of the atom not considered a
valid scientific theory?
a. He did not actually perform experiments.
b. He did not have good ideas.
c. Thomson’s ideas were better than his.
d. He drew the wrong conclusions from his
experiments.
3. Why was J.J. Thomson’s Cathode Ray Experiment
so groundbreaking and important?
a. Because it showed the scientific community
that the atom is, in fact, divisible.
b. Because it reinforced John Dalton’s previous
conclusions completely.
c. Because it showed that the atom has parts
with different charges.
d. Both a and c
4. Why was Ernest Rutherford’s Gold Foil Experiment
so groundbreaking and important?
a. Because it showed the scientific community
that the atom is, in fact, divisible.
b. Because it reinforced J.J. Thomson’s
previous conclusions completely.
c. Because it revealed the densely packed,
positively charged nucleus.
d. Because it showed that atoms are not
divisible.
5. What did Rutherford expect would happen when he
shot alpha particles through the gold foil? What
actually happened that surprised him?
a. He thought that the alpha particles would all
go through the foil, and that is what
happened.
b. He thought that the alpha particles would all
go through the foil, but some deflected
(bounced back).
c. He thought that the alpha particles would all
deflect (bounce back), but they went through
instead.
6. What is another name for Bohr’s model of the
atom?
a. Atomos Model
b. Plum Pudding Model
c. Solar System Model
d. Quantum Model
7. What is the biggest difference between
Schrodinger’s model of the atom and the other
scientist’s models?
a. Schrodinger’s model has a nucleus, and the
others do not.
b. Schrodinger’s model has electrons rotating
in circular orbits, and the others do not.
c. Schrodinger’s model has electrons in atomic
orbitals, and the others do not.
d. Schrodinger’s model is mostly empty space,
and the others are full.
8. In the box below, draw both Thomson’s Plum
Pudding Model and Ernest Rutherford’s Nuclear
Model of the atom. Take the time to visually
compare and contrast the two pictures.
9. Which of the following scientists thought the atom was divisible? Which scientists did not think the atom was
divisible? Next to each scientist’s name, write YES (the atom is divisible) or NO (the atoms is not divisible).
a. _________ Democritus
d. _________ Rutherford
b. _________ Dalton
e. _________ Bohr
c.
f.
_________ Thomson
_________ Schrodinger
OVER 
10. Fill in the missing boxes in the table below.
Particle
Symbol
Location in Atom
Proton
Relative Charge
Relative Mass
0 (neutral)
1
In the nucleus
e-
Electron
Neutron
11. Fill in the missing boxes in the table below using what you know about atomic math!
Element/Isotope
Atomic #
Be
Atomic Mass
# of Protons
10
4
# of Neutrons
Ag
47
34
Sulfur-33
# of Electrons
45
33
Iron-55
DOMINATE THE QUIZ TOMORROW!