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Electron Configuration Review

Total questions: 20

Worksheet time: 20mins

Name
Class
Date
1.
What atom matches this electron configuration?
1s22s22p63s2
a)
Neon
b)
Magnesium
c)
Aluminum
d)
Potassium
2.
What electron configuration matches an oxygen atom?
a)
1s22s22p63s2, 3p64s23d104p5
b)
1s22s22p4
c)
1s22s22p6
d)
1s22s22p63s23p64s23d1
3.
How many electrons can the d sublevel hold?
a)
8
b)
10
c)
2
d)
4
4.

What atom matches this electron configuration? [Xe] 6s2

a)
Mercury
b)

Barium

c)
Platinum
d)
Thallium
5.
How many electrons does Si contain? (click to see image)
a)
14
b)
28
c)
2
d)
4
6.

Each row on the periodic table represents:

a)

an energy level

b)

a sublevel

c)

an electron

d)

an orbital

7.
If electrons in an atom have the lowest possible energies, the atom is in the
a)
ground state.
b)
inert state.
c)
excited state.
d)
radiation-emitting state.
8.
According to the Bohr model of the atom, the single electron of a hydrogen atom circles the nucleus
a)
in specific, allowed orbits.
b)
in one fixed orbit at all times.
c)
at any of an infinite number of distances, depending on its energy.
d)
counterclockwise.
9.

In 1s2, the 1 means

a)

there is 1 electron

b)

the electrons are in the 1st energy level

c)

the shape is circular

d)

there is a -1 charge

10.

In 1s2, the 2 means

a)

there are 2 electrons in this level

b)

it is the 2nd energy level

c)

there is a +2 charge

d)

there is a -2 charge

11.

Which element has the following electron configuration: 1s22s1

a)

Lithium

b)

Cadmium

c)

Sodium

d)

Carbon

12.

Which element has the following electron configuration: 1s22s22p63s2

a)

Magnesium

b)

Cadmium

c)

Sodium

d)

Carbon

13.

Which element has the following electron configuration: 1s22s22p63s23p4

a)

Sulfur

b)

Cadmium

c)

Sodium

d)

Carbon

14.

Which element has the following electron configuration: 1s22s22p63s23p64s23d5

a)

Manganese

b)

Cadmium

c)

Sodium

d)

Carbon

15.

Which element has the following electron configuration: 1s22s2

a)

Beryllium

b)

Cadmium

c)

Sodium

d)

Carbon

16.

Which element has the following electron configuration: 1s22s22p6

a)

Beryllium

b)

Cadmium

c)

Neon

d)

Carbon

17.

Which element has the following electron configuration: [Ar] 4s1

a)

Beryllium

b)

Cadmium

c)

Potassium

d)

Carbon

18.

Which element has the following electron configuration: [He] 2s22p2

a)

Beryllium

b)

Cadmium

c)

Potassium

d)

Carbon

19.

Which element has the following electron configuration: [Kr] 5s24d2

a)

Beryllium

b)

Cadmium

c)

Potassium

d)

Zirconium

20.

Which element has the following electron configuration: [Kr] 5s24d105p5

a)

Beryllium

b)

Cadmium

c)

Potassium

d)

Iodine

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