1
Q
What do periods show?
Vertically along the side
A
Number of shells
2
Q
What do groups show?
Horizontal along the top
A
Number of electrons in outer shell
3
Q
What is an isotope
A
An element with the same number of protons but a different number of neutrons
4
Q
What is relative atomic mass?
A
The average mass of atoms of an element taking into account their abundance
5
Q
Atomic Number
A
Protons/Electrons
6
Q
Mass Number
A
Protons and Neutrons
7
Q
Diatomics
A
Elements that appear in pairs
8
Q
What are the Diatomic elements
A
H2, N2, F2, O2, I2, Cl2, Br2
Hydrogen, Nitrogen, Fluorine, Oxygen, Iodine, Chlorine, Bromine
Have, No, Fear, Of, Ice, Cold, Beers
iGCSE Chemistry
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