Mass number
Authored by Mari-Anna Reiljan-Dillon
Chemistry, Science
9th Grade
Used 34+ times
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12 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A helium atom has 2 protons. It has an atomic mass of 4. How many neutrons does it have?
2
4
6
8
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A phosphorus atom has 15 protons. It has a mass number of 31. How many neutrons does it have?
15
16
31
6
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
True or false: The mass number is the number of protons + the number of neutrons.
True
False
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A sodium atom has 11 protons. It has a mass number of 23. How many neutrons does it have?
11
23
12
5
5.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
A berilium atom has 4 protons. It has a mass number of 9. How many neutrons does it have?
5
4
9
8
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A mercury atom has 80 protons. It has a mass number of 201. How many neutrons does it have?
201
121
80
281
7.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
A calcium atom has 20 protons. It has a mass number of 40. How many neutrons does it have?
(a)
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