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WorksheetsElements & Isotopes
Total questions: 21
Worksheet time: 21mins
Name
Class
Date
1.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
2.
How many protons does this isotope of titanium have?
a)
48
b)
22
c)
26
d)
70
3.
How many neutrons in C-14?
a)
6
b)
7
c)
14
d)
8
4.
How many neutrons does the isotope below have? 89 36Kr
a)
53
b)
36
c)
89
d)
125
5.
How many neutrons does an atom of the isotope Neon-22 have?
a)
12
b)
10
c)
22
d)
20
6.
Isotopes of an element have a different number of...
a)
Protons
b)
Neutrons
c)
Electrons
d)
Mass
7.
Potassium-39 has how many neutrons?
a)
19
b)
18
c)
20
d)
21
8.
Nickel-59 has how many neutrons?
a)
30
b)
31
c)
32
d)
33
9.
Bromine-80 has how many neutrons?
a)
41
b)
42
c)
44
d)
45
10.
12 protons and 13 neutrons
a)
Mg-12
b)
Mg-13
c)
Mg-25
d)
Mg-24.305
11.
What is the name of this element?
a)
Helium
b)
Hydrogen
c)
Argon
d)
Silver
12.
What element is represented in this Bohr Model?
a)
Carbon
b)
Hydrogen
c)
Aluminum
d)
Lithium
13.
What is the name of this element?
a)
Lithium
b)
Boron
c)
Carbon
d)
Neon
14.
What is the name of this element?
a)
Beryllium
b)
Boron
c)
Barium
d)
Bromine
15.
What is the mass number of this atom?
a)
1
b)
3
c)
4
d)
7
16.
What is the atomic number of this atom?
a)
2
b)
4
c)
6
d)
none of the above
17.
What group does this element belong to?
a)
Group 1: Alkali metals
b)
Group 18: Noble Gases
c)
Group 2: Alkaline-Earth Metals
d)
Group 17: Halogens
18.
Identify this atom.
a)
Lithium
b)
Boron
c)
Carbon
d)
Neon
19.
How many valence electrons?
a)
2
b)
3
c)
5
d)
10
20.
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
21.
What is the atomic number of this element?
a)
17
b)
18
c)
35
d)
35.453
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