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Isotope

Total questions: 20

Worksheet time: 20mins

Name
Class
Date
1.
How many protons does this isotope of titanium have?
a)
48
b)
22
c)
26
d)
70
2.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
3.
How many electrons does a Copper atom have?
a)
63
b)
29
c)
92
d)
34
4.
Found in the nucleus of the atom
a)
electrons only
b)
protons only
c)
neutrons and protons
d)
neutrons and electrons
5.
An element is defined by its number of 
a)
protons
b)
electrons
c)
neutrons
d)
protons + electrons
6.

Isotopes of an element have a different number of...

a)

Protons

b)

Neutrons

c)

Electrons

d)

Mass

7.
In a correctly written symbol what would be located in the "A" position?
a)
number of neutrons
b)
atomic number
c)
number of electrons 
d)
mass number
8.
How many neutrons does the isotope below have?     89 36Kr
a)
53
b)
36
c)
89
d)
125
9.
Isotopes are atoms of the same element that have the same number of __________ but different number of __________ . Therefore, isotopes of the same element have different masses. 
a)
protons, neutrons
b)
protons, electrons
c)
neutrons, protons
d)
electrons, protons
10.
A neutral atom of the isotope 2612Mg would consist of
a)
12 protons, 26 neutrons, 26 electrons
b)
26 protons, 12 neutrons, 26 electrons
c)
26 protons, 14 neutrons, 14 electrons
d)
12 protons, 14 neutrons, 12 electrons
11.

An atom's atomic number is equal to

a)

The number of protons in the atom's nucleus

b)

The number of neutrons in the atom's nucleus

c)

The number of electrons in the atom

d)

The total of protons + neutrons

12.

What is the mass number of the element shown?

a)

15

b)

7

c)

8

d)

0

13.

An atom has 12 protons and 13 neutrons in its nucleus. Which is the correct symbol?

a)
b)
c)
d)
14.
A carbon isotope consists of 6 protons, 6 electrons and 8 neutrons.  What is the mass number for this isotope?
a)
12
b)
14
c)
6
d)
8
15.

12 protons, 10 electrons, 12 neutrons

a)

24Mg−2^{24}Mg^{-2}

b)

24Cr+2^{24}Cr^{+2}

c)

24Cr−2^{24}Cr^{-2}

d)

24Mg+2^{24}Mg^{+2}

16.

 26Al−3^{26}Al^{-3}  

a)

13 protons, 16 electrons, 13 neutrons

b)

12 protons, 15 electrons, 14 neutrons

c)

16 protons, 13 electrons, 13 neutrons

17.

What does the mass number of an element represent?

a)

The number of protons in an atom

b)

the number of neutrons in an atom

c)

the number of electrons in an atom

d)

the number of protons and neutrons in an atom

18.

What charge does an atom have when it GAINS electrons?

a)

Positive

b)

Negative

c)

Neutral

19.

What does it change in an ion?

a)

The number of electrons

b)

The number of protons

c)

The number of neutrons

20.

What does it happen to this atom?

a)

It LOSES electrons

b)

It GAINS electrons

c)

It GAINS protons

d)

It LOSES protons

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