Atomic structure Flashcards
1
Q
Atomic structure
A
An atom consists of a central nucleus, which:
- Contains protons and neutrons
- Is surrounded by electrons in shells
2
Q
Proton
A
Relative charge +1
Relative mass 1
3
Q
Neutron
A
Relative charge 0
Relative mass 1
4
Q
Electron
A
Relative charge -1
Relative mass Negligible
5
Q
Mass number
A
Top number
protons and neutrons
6
Q
Atomic number
A
Bottom number
protons only
7
Q
Isotopes
A
Isotopes are atoms of elements that have the same number of protons and electrons but a different number of neutrons
8
Q
Relative atomic mass
A
The mass of an atom of an element compared to 1/12th of carbon-12
9
Q
Calculating RAM
A
(Mass number x abundance)+(Mass number x abundance)
——————————
100
