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AP Chem Unit 1 Review

Total questions: 33

Worksheet time: 18mins

Name
Class
Date
1.

When an electron is in a higher energy level, it is ___________ the nucleus and therefore has _______ Coulombic attraction to the nucleus and is ________ to remove (...it has a _________ 1st ionization energy.)

a)

closer to

greater

harder

higher

b)

farther from

less

easier

lower

c)

farther from

greater

easier

higher

d)

closer to

less

harder

lower

2.

Moving across a row on the periodic table, the Zeff (nuclear charge) _______, therefore the valence electrons are ________ attracted to the nucleus, therefore the atomic radius __________ and the ionization energy ____________. 

a)

decreases

less

increases

decreases

b)

increases

less

increases

increases

c)

increases

more

decreases

increases

d)

decreases

more

decreases

decreases

3.

When reading a PES graph, the higher the peak, _______________

a)

the more energy the electrons contain

b)

the more electrons are in that sublevel

c)

the further the electrons are from the nucleus

d)

the higher the first ionization energy

4.

When reading a PES graph, a larger binding energy means

a)

there are more electrons in that sublevel

b)

the closer the electrons are to the nucleus

c)

the lower the ionization energy

d)

the further away the electrons are from the nucleus

5.

Cations (+) are _________ than their atoms. Anions (−) are _________ than their atoms.

a)

smaller

larger

b)

larger

smaller

c)

smaller

smaller

d)

larger

larger

6.

What is the electron configuration for the zinc atom in the ground state?

a)

1s2 2s2 2p6 3s2 3p6 4s2 3d10

b)

1s2 2s2 2p6 3s2 3p6 4s2 4d10

c)

1s2 2s2 2p6 3s2 3p6 4d10

d)

1s2 2s2 2p6 3s2 3p6 3d10

7.

What is the electron configuration for the zinc ion?

a)

1s2 2s2 2p6 3s2 3p6 3d10

b)

1s2 2s2 2p6 3s2 3p6 4s2 3d8

c)

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p2

d)

1s2 2s2 2p6 3s2 3p6 4d10

8.

In a PES graph, 1s electrons will have a _______ binding energy than 2s electrons.

a)

higher

b)

lower

c)

same

9.

When Ca becomes an ion, it _______ electrons and gets _________.

a)

loses

smaller

b)

loses

larger

c)

gains

smaller

d)

gains

larger

10.

If a metal and a nonmetal are in the same period, the ______ will have the higher ionization energy because it has ___________________.

a)

metal

higher effective nuclear charge

b)

nonmetal

higher effective nuclear charge

c)

metal

more energy levels

d)

nonmetal

more energy levels

11.

Based on Coulomb's law, an electron is more tightly held to the nucleus if the charge of the nucleus is ___________ and the distance between them is ____________.

a)

greater

greater

b)

greater

smaller

c)

smaller

smaller

d)

smaller

greater

12.

When a nonmetal atom becomes an ion, the ion is ____________ than the atom because of greater ________________.

a)

smaller

effective nuclear charge

b)

larger

electron-electron repulsion

c)

smaller

electron-electron repulsion

d)

larger

effective nuclear charge

13.

Calculate the average atomic mass from the mass spec.

a)

85.56 amu

b)

85.75 amu

c)

86.44 amu

d)

86.74

14.

What element has the following mass spec data?

a)

Thulium

b)

Copper

c)

Europium

d)

Zinc

15.

How many isotopes are shown in this mass spec?

a)

1

b)

2

c)

6

d)

7

16.

Based on the mass spec data, which Iron isotope is the most abundant?

a)

Fe-54

b)

Fe-56

c)

Fe-57

d)

Fe-58

17.

What element has the following mass spec data?

a)

Tin

b)

Tellurium

c)

Chromium

d)

Polonium

18.

The PES spectrum below is for the element _______________.

a)

O

b)

Ne

c)

N

d)

F

19.

Examine the spectrum below. Where would you expect the 2p peak for F be if it were on the same spectrum?

a)

To the left of the peak at 3.04

b)

To the right of the peak at 3.04

c)

To the left of the peak at 1.31

d)

To the right of the peak at 1.31

20.

How many valence electrons does the element pictured in the PES spectrum below have?

a)

1

b)

2

c)

3

d)

4

21.

Where would you expect the 2s peak for Sodium to fall relative to the presented spectrum of a different element below?

a)

Just to the left of the peak at 126

b)

Just to the right of the peak at 126

c)

Just to the left of the peak at 9.07

d)

Just to the right of the peak at 9.07

22.

Which of the following explains why atomic radius increases as you go down a group?

a)

The number of particles in the nucleus of the atom increases

b)

The number of electrons in the outermost shell of the atom increases

c)

The attractive force between the valence electrons and the nuclei of the atoms decreases

d)

the repulsive force between the valence electrons and the electrons in the inner shell decreases.

23.

Which of the following explains why sulfur has a lower first ionization energy than phosphorus in spite of the typical periodic trend? (draw an orbital diagram)

a)

The atomic radius of sulfur is greater than fluorine.

b)

Sulfur has a set of paired electrons in 3p which repel the other 3p electrons

c)

Phosphorus has a greater nuclear charge than sulfur and holds its electrons tighter

d)

Sulfur on average has more neutrons than phosphorus which interrupt and weaken the coulombic attraction between protons and electrons.

24.

The mass, in grams, of 1.35 x 10^26 molecules of water is equal to

(a)  

25.

Chloroform, a toxic substance that may cause severe liver, kidney, and heart damage, has the percent composition by mass of this compound is 10.06% carbon, 0.84% hydrogen, and 89.09% chlorine. What is the empirical formula of this compound?

a)

C3H3Cl

b)

CH6Cl3

c)

CH3Cl

d)

CHCl3

26.

For the reaction represented by the equation Pb(NO3)2+2KI  PbI2+2KNO3Pb\left(NO_3\right)_2+2KI\ \rightarrow\ PbI_2+2KNO_3  how many moles of lead iodide (PbI2)\left(PbI_2\right) are produced if 300 grams potassium iodide (KI)\left(KI\right)  react with Pb(NO3)2Pb\left(NO_3\right)_2  in excess?

a)

114.78 mol PbI2

b)

0.904 grams PbI2

c)

0.904 mol PbI2

d)

114.78 grams PbI2

27.

For the reaction represented by the equation 2KClO3 2KCI+3022KClO_3\rightarrow\ 2KCI+30_2  how many grams of potassium chlorate are required to produce 160. g of oxygen?

a)

408 g KClO3

b)

804 g KClO3

c)

598 g KClO3

d)

There is not enough information.

28.

Which electron configuration belongs to a Chloride (Cl-) ion?

a)

1s2 2s2 2p6 3s2 3p5

b)

1s2 2s2 2p6 3s2 3p6

c)

1s2 2s2 2p6 3s2 3p7

d)

1s2 2s2 2p6 3p7

29.

Choose the atoms and ions that are isoelectronic:

a)

Ar

b)

K+K^+  

c)

P3P^{3-}  

d)

BrBr^-  

e)

Al3+Al^{3+}  

30.

The graph shows the successive ionization energies of an unknown element. In which group would you expect to find this element?

a)

7

b)

6

c)

16

d)

17

31.

Using the table, how many valence electrons does unknown element P have? ***P IS NOT PHOSPHORUS IN THIS CASE!***

a)

5

b)

2

c)

3

d)

4

32.

What would the charge of Q be if it were to become an ion?

a)

3-

b)

3+

c)

5-

d)

5+

33.

Calculate the number of sulfate ions in 100.0 grams of Aluminum Sulfate.

a)

3.519 x 10^23 sulfate ions

b)

5.279 x 10^23 sulfate ions

c)

6.121 x 10^24 sulfate ions

d)

2.057 x 10^24 sulfate ions