Definitions Flashcards
Key Definitions in Chemistry
1
Q
Define
Relative Atomic Mass
A
The weighted mean mass of an atom of an element compared to 1/12 the mass of an atom of C-12
2
Q
Define
Relative Isotopic Mass
A
The mass of an atom of an isotope compared with 1/12 the mass of an atom of C-12
3
Q
Define
Isotope
A
Atoms of the same element with differing numbers os neutrons
Same number of protons & electrons, different number of neutrons
4
Q
Define
Mass Number
A
The number of protons & neutrons in the nucleus of an atom
5
Q
Define
Atomic Number
A
The number of protons in the nucleus of an atom
