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Atoms Practice

Total questions: 40

Worksheet time: 2hrs 0mins

Name
Class
Date
1.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
2.
The central region of an atom where its neutrons and protons are is its _______.
a)
Nucleus 
b)
Electron cloud
c)
Core 
d)
Center 
3.
The positive particles of an atom are 
a)
Electrons 
b)
Positrons 
c)
Neutrons 
d)
Protons 
4.
An atom with atomic number 6 would have how many protons?
a)
6
b)
12
c)
3
d)
Cannot be determined 
5.
Particles in an atom that are neutral and have no charge are ______. 
a)
Negatrons 
b)
Electrons 
c)
Neutrons 
d)
Protons 
6.
Which of the following is a negatively charged subatomic particle?
a)
Electron
b)
Proton
c)
Neutron
d)
Quark
7.
The particles that are found in the nucleus of an atom are _____.
a)
Neutrons and electrons
b)
Electrons only
c)
Protons and neutrons
d)
Protons and electrons
8.
Where are electrons of an atom found?
a)
Nucleus
b)
Electron Cloud
c)
Some are in the nucleus and some in the electron cloud.
d)
They are moving everywhere.
9.
What are the 3 particles that make-up the atom?
a)
Protons, neutrons, and isotopes
b)
Neutrons, isotopes, and electrons
c)
Positives, negatives, and electrons
d)
Protons, neutrons, and electrons
10.

All matter is made of what

a)

energy

b)

atoms

c)

electrons

d)

compounds

11.

How many atoms of each element are in NaCl?

a)

Na=1, Cl=1

b)

Na=2. Cl=2

c)

Na=1, Cl-2

12.

C6H12O6 has how many total atoms?

a)

6

b)

12

c)

24

13.
What does the 1.00794 stand for?
a)
Hydrogen
b)
atomic number
c)
atomic mass
d)
atomic explosion
14.
What is the atomic mass of "F"
a)
9
b)
18
c)
17
d)
19
15.

Normal neutral iron has:

a)

26 protons, 29 neutrons, 26 electrons

b)

26 protons, 30 neutrons, 28 electrons

c)

26 protons, 30 neutrons, 26 electrons

d)

30 protons, 26 neutrons, 26 electrons

16.

Elements that contain the same number of protons but different numbers of neutrons are called

a)

Elements

b)

Isotopes

c)

Nobel Gases

d)

Ions

17.

Atomic Mass =

a)

Electrons + protons

b)

Protons - electrons

c)

Protons + neutrons

d)

Neutrons + quarks

18.

What is the atomic number of Chlorine (Cl)?

a)

17

b)

Cl

c)

35.453

d)

Chlorine

19.
The number of protons and electrons are the same as
a)
Neutrons
b)
Atomic number
c)
atomic mass
d)
Electron shells
20.
What is the name of this element?
a)
Helium
b)
Hydrogen
c)
Argon
d)
Silver
21.

What element is represented in this Bohr Model?

a)

Carbon

b)

Hydrogen

c)

Aluminum

d)

Lithium

22.
What is the name of this element?
a)
Lithium
b)
Boron
c)
Carbon
d)
Neon
23.
What is the name of this element?
a)
Beryllium
b)
Boron
c)
Barium
d)
Bromine
24.
What is the mass number of this atom?
a)
1
b)
3
c)
4
d)
7
25.
What is the atomic number of this atom?
a)
2
b)
4
c)
6
d)
none of the above
26.
What's a valence electron?
a)
electrons in the second energy level
b)
electrons in the outermost energy level
c)
the atomic number
d)
electrons in the first level
27.

What is the charge on a neutron?

a)

positive

b)

negative

c)

neutral

28.

Atomic number of an atom is equal to

a)

# of electrons + # of protons.

b)

# of protons.

c)

# of neutrons + # of electrons.

d)

# of neutrons + # of protons + # of electrons.

29.

What is a valence electron?

a)

Electrons in the first orbital

b)

Electrons in the second orbital

c)

Electrons in the outer orbital

d)

Total number of electrons

30.

How many valence electrons?

a)

2

b)

3

c)

4

d)

5

31.

How many valence electrons?

a)

2

b)

3

c)

4

d)

5

32.

What row is this element located in on the periodic table?

a)

1

b)

2

c)

3

d)

4

33.
What is the chemical symbol for the element Silicon
a)
S
b)
Si
c)
si
d)
Sl
34.
What is the chemical symbol for the element hydrogen
a)
H
b)
He
c)
h
d)
he
35.
Electrons move around _______________ the nucleus and have a negative charge.
a)
inside
b)
outside
c)
on top of
d)
without
36.
The atomic number determines_____________________.
a)
its symbol
b)
the number of protons and neutrons
c)
what the element is
d)
the number of protons in the atom
37.
If an atom has 5 protons and 3 neutrons, what is its atomic number?
a)
5
b)
2
c)
8
d)
0
38.
The symbol of an element is always the first 2 letters of the element's name.
a)
true
b)
false
39.

The element lithium has 3 protons and 4 neutrons in its nucleus. Its mass number is __________.

a)

3

b)

4

c)

7

d)

12

40.

When atoms gain electrons __________.

a)

the atoms become electrically neutral

b)

the atoms become positively charged

c)

their atomic mass significantly increases

d)

the atoms become negatively charged

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