What is the mass number of a helium atom?
CHEMISTRY - Matter - In Depth Atomic Mass Units

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Science, Physics, Chemistry
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6th Grade - University
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Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2
4
8
6
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which atom was agreed upon in 1961 as the reference for atomic mass units?
Hydrogen
Oxygen-16
Carbon-12
Helium
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What fraction of a carbon-12 atom's mass is defined as one atomic mass unit (AMU)?
1/20
1/10
1/12
1/16
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If a hydrogen atom has a relative isotopic mass of 1, what is the relative isotopic mass of a fluorine atom?
9
24
14
19
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you determine the relative isotopic mass of a nitrogen atom?
By counting its electrons
By using its mass number, which is 14
By comparing it to a hydrogen atom
By measuring its weight in grams
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