Atomic Structure - Mass Number & Isotopes Flashcards
1
Q
What is the Mass Number?
A
The total number of protons and neutrons in the nucleus of an atom
2
Q
What is the Atomic (Proton) Number?
A
The number of protons in the nucleus of an atom
3
Q
What are Isotopes of an element?
A
Atoms with the same number of protons but different numbers of neutrons
4
Q
What is Relative Atomic Mass?
A
The average mass of an atom of an element on a scale where an atom of carbon-12 is exactly 12
5
Q
What is Relative Isotopic Mass?
A
The mass of an atom of an isotope of an element on a scale where an atom of carbon-12 is exactly 12
6
Q
What is Relative Formula Mass?
A
The average mass of a formula unit on a scale where an atom of carbon-12 is exactly 12
