Atomic Structure Flashcards
1
Q
Atomic number
A
The atomic number tells you the number of protons (and which atom it is)
2
Q
Protons and electrons
A
The number of protons is the same as the number of electrons (in an atom as the charges cancel out)
3
Q
Mass number
A
The mass number is the number of particles in the nucleus (protons + neutrons)
4
Q
Neutrons
A
To find the number if neutrons = Mass number - atomic number
5
Q
Mass and charge: protons
A
Mass = 1 Charge = +1
6
Q
Mass and charge: neutrons
A
Mass = 1 Charge = 0
7
Q
Mass and charge: electrons
A
Mass = 1/2000 Charge = -1
8
Q
Isotopes
A
Isotopes are atoms of the same element with a different number of neutrons
