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AP Chemistry Atomic Structure

Total questions: 27

Worksheet time: 24mins

Name
Class
Date
1.

Looking at the following Mass Spectra and molecular ion, what element is possibly found in this compound??

a)

Cl

b)

N

c)

Br

d)

S

2.
Which species would get deflected by the greatest degree in the mass spectrometer?
a)
12C+
b)
13C+
c)
13C2+
d)
14C+
3.
What do the peaks on the mass spectrum represent?
a)
anions
b)
different isotopes
c)
atoms with differing numbers of electrons
d)
numbers of electrons
4.
What do the heights of the peaks represent in the mass spectrum?
a)
number of isotopes
b)
relative abundance of each isotope
c)
average atomic mass
d)
charge:mass ratio
5.
Find the molar mass of C8H18.
a)
114.28 g/mol
b)
26.00 g/mol
c)
66.18 g/mol
d)
338.52 g/mol
6.
How many representative particles are found in 1.23 mol of Polonium. 
a)
2.41x1024
b)
7.53x1023
c)
6.02x1023
d)
1.20x1024
7.
How many moles are in 1.00x1025 Ni2+ ions?
a)
1.661 mol
b)
16.61 mol
c)
0.1661 mol
d)
166.1 mol
8.
You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements
a)
SO
b)
SO2
c)
SO3
d)
SO4
9.
What is the molecular formula if the empirical formula is C2H5 and the molecular molar mass is 58.14 g/mol?
a)
C2H5
b)
C4H10
c)
C1H2.5
d)
C4H8
10.
Which of the following is the correct empirical formula for C4H10
a)
C2H5
b)
CH2.5
c)
C8H20
d)
C4H10
11.
Which has the greater EN: 
Cl or Al?
a)
Cl
b)
Al
12.
Which has the greater EN: 
H or F?
a)
H
b)
F
13.
Which of the following will have a higher electronegativity than arsenic (As)?
a)
Carbon (C)
b)
Neon (Ne)
c)
Antimony (Sb)
d)
Germanium (Ge)
14.
Which of the following will have a lower ionization energy than Scandium (Sc)?
a)
Helium (He)
b)
Titanium (Ti)
c)
Calcium (Ca)
d)
Magnesium (Mg)
15.
Which atom has the largest atomic radius?
a)
potassium
b)
rubidium 
c)
francium
d)
cesium
16.
Atoms that have a high electronegativity, _______________.
a)
give up their electrons more easily.
b)
hold on to their electrons more tightly.
c)
have more electron shells.
17.

As you move down a group on the periodic table, atoms get bigger. This is because ____________.

a)

The atoms have more mass.

b)

The atoms have more protons.

c)

The atoms have more energy levels

d)

The atoms have a greater nuclear charge

18.

The element in Period 2 with the highest electronegativity is Cl. Why?

a)

Cl is the largest and has the greatest effective nuclear charge

b)

Cl is the smallest and has the lowest effective nuclear charge

c)

Cl is the largest and has the lowest effective nuclear charge

d)

Cl is the smallest and has the greatest effective nuclear charge

19.

Put the following in order of increasing ionization energy (smallest to largest): Neon, Lithium, Carbon

a)

Lithium, Carbon, Neon

b)

Carbon, Lithium, Neon

c)

Neon, Carbon, Lithium

d)

Lithium, Neon, Carbon

20.

Which graph shows the relationship between distance and force?

a)
b)
c)
d)
21.

A reason why fluorine has a higher ionization energy than oxygen is that fluorine has a

a)

more energy levels

b)

larger nuclear charge

c)

more valence electrons

d)

less energy levels

22.

What is the total number of electrons in a Cu+ ion?

a)

28

b)

29

c)

30

d)

36

23.

What can be concluded if an ion of an element is smaller than an atom of the same element?

a)

The ion is negatively charged because it has fewer electrons than the atom.

b)

The ion is negatively charged because it has more electrons that the atom

c)

The ion is positively charged because it has fewer electrons than the atom.

d)

The ion is positively charged because it has more electrons than the atom

24.

Which characteristics are associated with metals?

a)

low ionization energy and low electronegativity

b)

low ionization energy and high electronegativity

c)

high ionization energy and low electronegativity

d)

high ionization energy and high electronegativity

25.

Which of the following factors contributes to the increase in ionization energy from left to right across a period?

a)

an increase in the shielding effect

b)

an increase in the size of the electron cloud

c)

an increase in the number of protons

d)

fewer electrons in the highest occupied energy level

26.

Which of these has a greater electron affinity?

a)

Na

b)

K

27.

Which of these has a greater electron affinity?

a)

Si

b)

Cl