Atoms And Ions Flashcards
1
Q
Mass number
A
Number of protons + number of neutrons
2
Q
Number of electrons
A
Atomic number
3
Q
Number of neutrons
A
Mass number - atomic number
4
Q
Isotopes
A
Atoms of the same element with the same number of protons and different number of neutrons
5
Q
Relative atomic mass
A
Sum of (isotope mass x isotope abundance) / sum of relative abundance
6
Q
What makes a neutral atom
A
Same number of protons and electrons
7
Q
Why are noble gases unreactive
A
As they have a full outer shell
8
Q
Atomic number
A
Number of protons
