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Chem Unit 3 Review

Total questions: 45

Worksheet time: 23mins

Name
Class
Date
1.

Valence electrons are located...

a)

inside the nucleus

b)

in outer space

c)

on the outermost orbit of an atom

2.
a)

10

b)

2

c)

8

d)

18

3.
a)

14

b)

4

c)

3

d)

28

4.

What is the maximum number of electrons that an s orbital can have?

a)

1 electron

b)

2 electrons

c)

3 electrons

d)

4 electrons

5.

How many electrons can the p sublevel hold?

a)
8
b)

6

c)
2
d)
4
6.
What atom matches this electron configuration?
1s22s22p63s2
a)
Neon
b)
Magnesium
c)
Aluminum
d)
Potassium
7.
What electron configuration matches an oxygen atom?
a)
1s22s22p63s2, 3p64s23d104p5
b)
1s22s22p4
c)
1s22s22p6
d)
1s22s22p63s23p64s23d1
8.
The electron configuration of an atom is 1s22s22p6.  The number of electrons in the atom is 
a)
3
b)
6
c)
8
d)
10
9.

True or False: The ground state is the highest energy state of an electron.

a)

True

b)

False

10.
For an electron to change from ground state to an excited stated it must...
a)
Absorb energy
b)
Release energy
11.
Emission of light from an atom occurs when an electron
a)
drops from a higher to a lower energy level.
b)
   jumps from a lower to a higher energy level.   
c)
   moves within its atomic orbital.
d)
falls into the nucleus.
12.

Look carefully at the picture. It shows an electron in the excited state on the left, and the electron returning to its ground state on the right. When the electron return to the ground state it emits a_______________________.

a)

blast of cold air

b)

electrostatic charge

c)

proton

d)

photon (light)

13.

The picture shows an atom in the ground state absorbing energy and the electron jumps to the excited state. Which state has higher energy?

a)

Ground State

b)

Excited State

14.

What is a cation's charge?

a)

positive

b)

negative

c)

neutral

d)

depends on the element

15.

What is an anion's charge?

a)

positive

b)

negative

c)

neutral

d)

depends on the element's charge

16.

Is potassium a cation or an anion?

a)

cation

b)

anion

17.

If an atom gains electrons, the charge will be positive.

a)

true

b)

false

18.

Which particles change the charge in atoms when ions are formed?

a)

Protons

b)

Electrons

c)

Neutrons

19.

Oxide is a(n)

a)

Cation

b)

Metal

c)

Anion

d)

Isotope

20.

Waves with a long wavelength have a __________ energy

a)

high

b)

low

21.

Waves with a high frequency have __________ energy

a)

high

b)

low

22.

Which of the following colors of light have the highest energy

a)

red

b)

orange

c)

green

d)

violet

23.

An electron that has gained energy beyond normal is said to be ...

a)

excited

b)

grounded

c)

naturalized

24.
When an atom has all of its electrons in the lowest energy orbitals available, the atom is  
a)
in ground state
b)
in excited state
c)
giving off light energy
d)
unstable
25.
What color has the shortest wavelength, or the highest frequency?
a)
yellow
b)
blue
c)
red
d)
violet
26.

The frequency of violet light is 7.5x1014 Hz. What is its wavelength?

a)

4.0x10-7 m

b)

4.0x107 m

c)

2.25x1023m

d)

2.25x1023 Hz

27.

Red light has a wavelength of 6.75 x 10-7 m. What is its frequency?

a)

2.03x1011 m

b)

4.44x1014 Hz

c)

4.44x1014 nm

d)

2.03x1011 Hz

28.

A wave with a large wavelength will have a ______ frequency and _____ energy

a)

high, low

b)

high, high

c)

low, high

d)

low, low

29.

If short wavelength has more ENERGY than long wavelength, which color Lightsaber pictured is the most dangerous, or powerful?

a)

Red

b)

Orange

c)

Blue

d)

Green

30.
The unit of frequency is ___.
a)
meters
b)
nanometers (nm)
c)
m/s
d)
Hertz
31.

The unit of wavelength is ___.

a)
meters
b)

speed

c)
m/s
d)
Hertz
32.
When writing Lewis Structures, only __________ electrons are used.
a)
Inner shell
b)
Core 
c)
Valence
d)
Stable
33.

How would you draw a Lewis dot diagram for Magnesium?

a)
b)
c)
d)
34.

This is a correct Lewis structure for nitrogen (N)

a)
true
b)
false
35.

This is a correct Lewis structure for oxygen (O)

a)
true
b)
false
36.

The Lewis structure of an anion has...

a)

zero dots

b)

all eight dots

37.

The Lewis structure of an cation has...

a)

zero dots

b)

all eight dots

38.

This orbital diagram represents:

a)

Carbon

b)

Boron

c)

Nitrogen

d)

Oxygen

39.

What is incorrect about this orbital diagram?

a)

Both arrows in the 2p box should be pointing up

b)

There are too many electrons in the 1s orbital

c)

In the 2p boxes, there should only be 1 electron in the first 2p box and one in the 2nd 2p box

d)

All the arrows should be pointing up

40.
Which element is depicted from this orbital diagram
a)
Fluorine
b)
Neon
c)
Chlorine
d)
Argon
41.

The number of arrows placed in an orbital diagram = the number of...

a)

atoms

b)

electrons

c)

protons

d)

neutrons

42.

The s-block is represented by the letter....

a)

A

b)

B

c)

C

d)

D

43.

The p-block is represented by the letter....

a)

A

b)

B

c)

C

d)

D

44.

The d-block is represented by the letter....

a)

A

b)

B

c)

C

d)

D

45.

The f-block is represented by the letter....

a)

A

b)

B

c)

C

d)

D

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