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Electrons in Atoms

Total questions: 65

Worksheet time: 1hrs 11mins

Name
Class
Date
1.

Which of the following elements has a full outer energy level of electrons?

a)

krypton

b)

strontium

c)

iodine

d)

sodium

2.

Which element has 2 valence electrons?

a)

beryllium

b)

helium

c)

sodium

d)

boron

e)

silicon

3.

Which of the following elements has 5 valence electrons?

a)

boron

b)

phosphorus

c)

magnesium

d)

chlorine

4.

How many total electrons does a neutral atom of copper have?

a)

29

b)

11

c)

63

d)

14

5.

How many valence electrons does an atom of fluorine have?

a)

3

b)

5

c)

7

d)

9

e)

17

6.

Which change occurs when an atom in an excited state returns to the ground state?

a)

Energy is emitted

b)

Energy is absorbed

c)

The number of electrons decreases

d)

The number of electrons increases

7.

If the wavelength of an electromagnetic wave is longer, what is true about the energy?

a)

Energy is higher.

b)

Energy is lower.

c)

Energy is not dependent on wavelength.

d)

Energy is cancelled out.

8.
Light is a form of 
a)
energy
b)
radiation
c)
reflection
9.
All waves carry
a)
energy
b)
light 
c)
matter
d)
particles
10.
True or False: Electrons can exist in between energy levels.
a)
TRUE
b)
FALSE
11.

Why are emission spectra useful?

a)

they allow us to identify elements

b)

they tell us how many protons there are in a nucleus

c)

they help us predict the chemical behavior of an element

12.
For an electron to change from ground state to an excited stated it must...
a)
Absorb energy
b)
Release energy
13.

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.

14.
Put the visible light colors in order from longest wavelength to shortest wavelength
a)
Violet, Indigo, Blue, Green, Orange, Yellow, Red
b)
Red, Yellow, Green, Orange, Violet, Blue, Indigo
c)
Red, Orange, Yellow, Green, Blue, Indigo, Violet
15.
The way in which electric and magnetic forces interact
a)
Electromagnetic
b)
Spectrum
c)
Wavelength
d)
Prism
16.

A tiny bundle of energy by which light travels

a)

Atom

b)

Neutrino

c)

Photons

d)

Electron

17.

Which electron configuration is correct for oxygen (8O)?

a)

1s22s22p63s2, 3p64s23d104p5

b)

1s22s22p4

c)

1s22s22p6

d)

1s22s22p63s23p64s23d1

18.

What atom matches this electron configuration?

1s22s22p63s2

a)

20Ca

b)

12Mg

c)

13Al

d)

19K

19.

How many electrons per shell does sodium (11Na) have?

a)

2,8

b)

2,8,2

c)

2,8,1

d)

2,2,8

20.

Which are the four atomic orbitals?

a)

s,p,d,f

b)

a,b,c,d

c)

s,t,e,p

d)

d,r,o,f

21.

Within an energy level, which orbitals are the lowest in energy?

a)

s

b)

f

c)

d

d)

p

22.

How many electrons can there be in one orbital?

a)

2

b)

4

c)

6

d)

10

23.
When an electron moves from a lower to a higher energy level, the electron ________________.
a)
gains a certain amount of energy
b)
gains any amount of energy
c)
loses energy
d)
moves closer to the nucleus
24.
What is the maximum number of electrons in the second energy level?
a)
18
b)
8
c)
32
d)
2
25.
What does Pauli exclusion principle state ?
a)
states that each electron occupies the lowest energy orbital available
b)
states that a maximum of two electrons can occupy a single atomic orbital, but if only if the electros have opposite spins
c)
states that single electrons electrons with the same spin must occupy each-energy orbital before additional electrons with opposite spins can occupy the same orbitals
26.
What does Hund's rule states ?
a)
states that single electrons electrons with the same spin must occupy each-energy orbital before additional electrons with opposite spins can occupy the same orbitals
b)
states that each electron occupies the lowest energy orbital available
c)
states that a maximum of two electrons can occupy a single atomic orbital, but if only if the electros have opposite spins
27.

What is represented by an empty box in electron configuration diagrams?

a)

a filled orbital

b)

an unoccupied orbital

c)

a single electron occupies this orbital

28.

The method that describes the possible positions of electrons in an atom is its

a)

valence electron

b)

ground-state level

c)

electron configuration

d)

orbital

29.

Electrons in the outermost shell are known as

a)

valence electron

b)

orbital electron

c)

quantum electron

d)

dot electron

30.

In electron configuration the superscript represents

a)

the occupied orbital

b)

amount of electrons in an orbital

c)

amount of electrons missing in an orbital

d)

amount of electrons in a principal energy level

31.
the lowest energy state of electrons in an atom is called the ______________.
a)
dependent state
b)
excited state
c)
configuational state
d)
ground state
32.
The light given off when electricity is passed through sodium gas is called sodium's _______________
a)
wavelength
b)
emission spectrum
c)
light
d)
continuous spectrum
33.
What is the shape of a p atomic orbital?
a)
an oval
b)
a sphere
c)
an egg
d)
a dumbbell or peanut
34.
In Bohr's model of the atom, where are the electrons and protons located?
a)
the electrons orbit the protons, which are at the center of the atom
b)
the electrons and protons move throughout the atom
c)
the electrons and protons are located throughout the atoms, but they are not free to move
d)
the electrons are stationary around the protons, which are at the center of the atom
35.
Emission of light from an atom occurs when the electron ________.
a)
moves within its atomic orbital
b)
jumps from a lower to a higher energy level
c)
falls into the nucleus
d)
drops from a higher to a lower energy level
36.
Which has more energy?
a)
electron in the 1 energy level
b)
electron in the 2 energy level
c)
electron in the 3 energy level
d)
electron moving from the 2 to the 1 energy level
37.
In the Bohr model, if an atom has 6 electrons, how many will be in the second energy level?
a)
2
b)
4
c)
6
d)
none
38.
What is this element?
1s22s22p63s2
a)
Neon
b)
Magnesium
c)
Aluminum
d)
Potassium
39.
Electrons occupy orbitals of lowest energy first is part of what electron configuration rule?
a)
Hund’s Rule
b)
Aufbau Principle
c)
Pauli Exclusion Principle
40.
What is this element?
1s22s22p63s23p64s23d10
a)
Zinc
b)
Copper
c)
Nickel
d)
Germanium
41.
What is the noble gas configuration for Oxygen?
a)
[Ar] 3p4
b)
[He] 2s2 2p4
c)
[He] 3s2 3p4
d)
[Li] 2s2 2p4
42.
What is the electron configuration for Bromine (Br)
a)
1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d1
b)
1s2, 2s2, 2p4
c)
1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d10, 4p5
d)
1s2, 2s2, 2p6
43.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
44.
What do you start electron configuration with?
a)
1s2
b)
1d10
c)
1f14
d)
1p6
45.
How many electrons can the d sublevel hold?
a)
8
b)
10
c)
2
d)
4
46.
How many total electrons can the f orbitals in a f sublevel hold?
a)
2
b)
14
c)
6
d)
10
47.
What is the noble gas shorthand electron for Sulfur atom?
a)
[Ar] 3p4
b)
[He] 3s23p4
c)
[Ne] 3s23p4
d)
[Na] 3s23p4
48.
An orbital can at most hold how many electrons?
a)
1 electron
b)
2 electrons
c)
3 electrons
d)
4 electrons
49.
Orbitals can hold a maximum of two electrons each with opposite spins is which rule?
a)
Aufbau Principle
b)
Pauli Exclusion Principle
c)
Hund's Rule
50.
Electrons filling orbitals with more than one sublevel will be equally distributed to each sublevel before any of the sublevels receives a 2nd electron is known as what rule?
a)
Aufbau Principle
b)
Pauli Exclusion Principle
c)
Hund's Rule
51.
What electron configuration matches an oxygen atom?
a)
1s22s22p63s2, 3p64s23d104p5
b)
1s22s22p4
c)
1s22s22p6
d)
1s22s22p63s23p64s23d1
52.
Which kind of wave has the greatest frequency?
a)
gamma rays
b)
infrared
c)
ultraviolet
d)
microwaves
53.
What is this element?
1s22s22p63s23p1
a)
Neon
b)
Magnesium
c)
Aluminum
d)
Potassium
54.
All types of electromagnetic radiation have the same
a)
speed
b)
wavelength
c)
frequency
d)
energy
55.
Electrons in the ground state have...
a)
the lowest possible energy
b)
the highest possible energy
c)
a way to escape the energy level they are in
d)
lots of energy
56.
In the quantum mechanical model of the atom, within the orbital 
a)
you only know where you will likely find an electron
b)
you know the exact location of an electron
c)
electrons travel around the nucleus like planets around the sun
d)
you will find protons
57.
An element with 8 electrons in its highest energy level is a(n)
a)
noble gas
b)
alkali metal
c)
d block element
d)
s block element
58.
How many orbitals on the second energy level?
a)
2
b)
3
c)
4
d)
8
59.
How many electrons are needed to completely fill the third energy level?
a)
3
b)
9
c)
18
d)
27
60.
What is the atomic mass of the atom pictured? 
a)
9
b)
10
c)
18
d)
19
61.
What is the atomic number of the atom pictured? 
a)
11
b)
12
c)
22
d)
23
62.
Which letter represents a neutron?
a)
A
b)
B
c)
C
d)
D
63.

This is a correct electron dot diagram for nitrogen (N)

a)

true

b)

false

64.
This is a correct dot diagram for magnesium (Mg)
a)
true
b)
false
65.
This is a correct dot diagram for oxygen (O)
a)
true
b)
false

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