Structure of the Atom: Study Guide
Name:__________________Class:_______
MULTIPLE CHOICE
1) What part of the atom holds almost all of the mass?
a. nucleus
b. neutrons
c. electron cloud
d. electron rings
2) What part of the atom makes up most of the volume?
a. protons
b. nucleus
c. electron cloud
d. neutrons
3) Color, ductility, freezing point, and density are all examples of which type of property
of matter.
a. reacting
b. chemical
c. physical
d. changing
4) Which two subatomic particles must have the same number to maintain a "neutral"
atom with no charge?
a. protons & neutrons
b. electrons & protons
c. neutrons & electrons
d. atomic number & neutrons
5) Which subatomic particle determines the identity of the element?
a. atomic mass
b. neutrons
c. atomic number
d. protons
6) The metal Sodium (Na) reacts violently with water, this describes which type of
property.
a. chemical
b. physical
c. atomic
d. none of the above
7) Which of the following are the subatomic particles that make up an atom?
a. neutrons, electrons, and atomic mass
b. neutrons, electrons, and protons
c. electrons and protons
d. neutrons and protons
8) Changing phase from a solid to a liquid is a chemical change.
a. True
b. False
9) Which subatomic particles have a positive charge and are located in the nucleus?
a. neutrons
b. atoms
c. electrons
d. protons
10) Which subatomic particles have a negative charge and are located outside of the
nucleus?
a. protons
b. neutrons
c. electrons
d. electrons and neutrons
11) Which subatomic particles are neutral with no charge and are located in the nucleus?
a. electrons
b. neutrons
c. protons
d. electrons and neutrons
12) Who first proposed the atom, giving it the name “atomos” which means indivisible in
Greek.
a. Newton
b. Democritus
c. Bohr
13) The temperature at which a liquid changes from a liquid to a gas is called
a. melting point
b. freezing point
c. absolute zero
d. boiling point
14) Which of the following objects would you expect to float in a freshwater lake.
a. object A, density is 2.70 g/ml
b. object B, density is 1.95 g/ml
c. object C, density is 0.83 g/ml
d. none of the above
SHORT ANSWERS
1) What is the smallest unit of matter that retains the identity of the substance?
2) Atoms are composed of two regions, what are they and what do they contain?
3) What does the Atomic Number tell you about an atom?
4) Which two particles add up to equal the mass number?
5) Solve this equation:
#of neutrons=________ # - atomic #
12) Where are the protons and neutrons located in the atom?
13) Where do particles go on the electron cloud?
14. List how many electrons each ring or energy level in the electron cloud can hold?
1st Ring=
2nd Ring=
3rd Ring=
4th Ring=
15) Label the parts of the Element below:
7
N
Nitrogen
14.0067
Complete the information on the following two elements, then complete the Bohr model
for each also.
Atomic Number
Element Name Calcium
Element Symbol
Atomic Mass
Mass Number
Protons
Neutrons
Electrons
Atomic Number
Element Name Oxygen
Element Symbol
Atomic Mass
Mass Number
Protons
Neutrons
Electrons