Matter and Atomic Structure
Practice Test
1.
What determines the chemical behavior of an element?
SC.A.1.4.1
a.
the number of energy levels
b.
the size of the nucleus
c.
its isotopes
d.
the valence electrons
2.
According to the symbols shown in the figure, in which state of matter do these elements occur?
SC.A.1.4.3
a.
gas
b.
liquid
c.
plasma
d.
solid
3.
What is a solid that has particles arranged in regular geometric patterns?
SC.A.1.4.1
a.
a covalent bond
b.
a crystalline structure
c.
a gas
d.
an iconic compound
4.
The number of protons in an atom's nucleus is the __________.
SC.A.2.4.1
a.
atomic number
b.
radioactivity number
c.
isotopic number
d.
mass number
5.
Electrons tend to occupy the __________ energy level.
SC.A.1.4.5
a.
highest available
b.
lowest available
c.
intermediate
d.
second
6.
A __________ is composed of two or more atoms held together by covalent bonds.
SC.A.1.4.5
a.
a gas
b.
covalent bond
c.
molecule
d.
ionic bond
7.
When a gas cools, it __________ thermal energy in the process of __________.
SC.A.1.4.4
a.
gains, condensation
b.
releases, condensation
c.
gains, sublimation
d.
releases, evaporation
8.
What is a gas that is composed of positive ions and free electrons?
SC.A.1.4.3
a.
hydrogen
b.
neon
c.
a liquid
d.
a plasma
9.
What is an ion?
SC.A.2.4.1
a.
a gas
b.
a charged particle
c.
a molecule
d.
an isotope
10.
What process is labeled C in the figure?
SC.A.1.4.3
a.
condensation
b.
melting
c.
sublimation
d.
evaporation
11.
What do the nuclei of some isotopes release during radioactive decay?
SC.A.2.4.2
a.
radiation
b.
lead
c.
their nuclei
d.
valence electrons
12.
Bases produce __________ in solution.
a.
hydroxide ions
b.
hydrogen ions
c.
oxygen ions
d.
helium ions
13.
What is the attractive force between two particles of opposite charge called?
SC.A.1.4.5
a.
a covalent bond
b.
an isotope
c.
an ionic bond
d.
a compound force
14.
Why does a water molecule have a bent shape?
SC.A.1.4.5
a.
because it occurs on Earth as a solid, liquid, and a gas
b.
it's a polar molecule
c.
it has ionic bonds
d.
it's a compound
