The Elements
Practice Test
1.
The elements in group 1A are grouped together because they __________.
a.
are the lightest elements
b.
all have one valence electron
c.
are all solids at room temperature
d.
are all metals
2.
Which of the following have the same number of electrons? Cl
–
, O
2–
, F, Ca
2+
, Fe
3+
a.
Ca
2+
and Cl
–
b.
O
2–
and F
c.
Ca
2+
and Fe
3+
d.
F and Cl
–
3.
Which of the following is true for any atom?
a.
atomic number = number of protons = number of electrons
b.
mass number = number of protons = number of electrons
c.
mass number = number of protons = number of neutrons
d.
atomic number = number of neutrons = number of electrons
4.
Which of the following power sources makes use of the photoelectric effect?
a.
alkaline batteries
b.
nuclear power plants
c.
diesel engines
d.
solar power cells
5.
The minimum amount of energy that can be gained or lost by an electron is a _________.
a.
queue
b.
quantum
c.
planck
d.
quart
6.
Which block consists of the elements in groups 3A through 8A?
a.
p block
b.
s block
c.
f block
d.
d block
7.
How many protons are present in an atom potassium-39?
a.
19
b.
58
c.
39
d.
20
8.
The atomic radius generally _______________ on the periodic table.
a.
increases from top to bottom and from right to left
b.
increases bottom to top and from right to left
c.
increases from bottom to top and from left to right
d.
increases from top to bottom and from left to right
9.
Why was Mendeleev's periodic table widely accepted?
a.
His periodic table listed all of the elements in the correct order.
b.
He organized the first 14 known elements.
c.
He was the first to notice a pattern of similar properties among elements.
d.
He predicted the existence and properties of undiscovered elements.
10.
How would you classify an element that has an electron configuration of [Kr]5s
2
4d
10
5p
5
?
a.
a noble gas
b.
an alkali metal
c.
a transition metal
d.
a representative element
11.
Which group on the periodic table is known as the halogens?
a.
group 7A
b.
group 8A
c.
group 2A
d.
group 1A
12.
The concept that all moving particles have wave characteristics is attributed to ___________.
a.
Heisenberg
b.
Thomson
c.
Bohr
d.
de Broglie
13.
An element with the outermost electron configuration, ns
2
np
4
, could be _______.
a.
Se
b.
Zr
c.
Mo
d.
Pb
14.
The fewer unpaired electrons in the d sublevel of a transition metal, the __________.
a.
greater the hardness
b.
lower the boiling point
c.
higher the melting pointq
d.
higher the boiling point
15.
Graphite and diamond are _________ of carbon.
a.
isotopes
b.
ores
c.
oxides
d.
allotropes
16.
Which metal is the lightest?
a.
boron
b.
lithium
c.
aluminum
d.
magnesium
17.
What is the electron configuration for tin (Sn)?
a.
[Kr]5s
2
3d
10
3f
14
5p
4
b.
[Kr]5s
2
4d
10
5p
2
c.
[Kr]5s
2
3d
10
4f
14
5p
2
d.
[Kr]5s
2
3d
10
4d
14
5p
4
18.
The chloride of ____________ is colorless.
a.
Ca
2+
b.
Co
2+
c.
Cr
3+
d.
Cu
2+
19.
Elements in group 7A are __________.
a.
halogens
b.
alkali metals
c.
noble gases
d.
alkaline earth metals
20.
How many types of orbitals are present in atoms of elements in the third period of the periodic table?
a.
4
b.
3
c.
2
d.
1
