Atoms, Compounds and Isotopes

Revision Cards on Atoms, Compounds and Isotopes. Good for your Chemistry Unit 2 exam.

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What sub-atomic particles are in the nucleus of an atom?
Protons, Neutrons
1 of 8
What sub-atomic particles are in the shells of an atom?
Electrons
2 of 8
What is the mass number of an atom?
Total number of protons and neutrons
3 of 8
What is the atomic number?
Number of protons
4 of 8
How do you get the number of neutrons in an atom?
Subtract the atomic number from the mass number
5 of 8
Why aren't electrons counted in the mass number?
Their relative mass is too small
6 of 8
How are compounds formed?
When atoms of two or more elements are chemically combined together
7 of 8
What are isotopes?
Different atoms of the same element which have the same number of protons but different amount of neutrons
8 of 8

Other cards in this set

Card 2

Front

What sub-atomic particles are in the shells of an atom?

Back

Electrons

Card 3

Front

What is the mass number of an atom?

Back

Preview of the front of card 3

Card 4

Front

What is the atomic number?

Back

Preview of the front of card 4

Card 5

Front

How do you get the number of neutrons in an atom?

Back

Preview of the front of card 5
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