Atomic Structure - Mass Number & Isotopes Flashcards Preview

AQA A Level Chemistry > Atomic Structure - Mass Number & Isotopes > Flashcards

Flashcards in Atomic Structure - Mass Number & Isotopes Deck (6)
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1

What is the Mass Number?

The total number of protons and neutrons in the nucleus of an atom

2

What is the Atomic (Proton) Number?

The number of protons in the nucleus of an atom

3

What are Isotopes of an element?

Atoms with the same number of protons but different numbers of neutrons

4

What is Relative Atomic Mass?

The average mass of an atom of an element on a scale where an atom of carbon-12 is exactly 12

5

What is Relative Isotopic Mass?

The mass of an atom of an isotope of an element on a scale where an atom of carbon-12 is exactly 12

6

What is Relative Formula Mass?

The average mass of a formula unit on a scale where an atom of carbon-12 is exactly 12