periodic table

trends and groups

group 1

group 1

alkaline metals

alkaline metal characteristic

low melting/boiling points

group 2

alkaline earth metals

alkaline earth metals characteristcs

high melting/boiling point

groups 3-12

transition metals

group 17

halogens

group 18

noble gases

core charge

increases across the period

remains constant down the group

electronegativity

increases across the period

decreases down the group

atomic radii

decreases across the period

increases down the group

first ionisation energy

increases across the period

decreases down the group

(most of the time)

reactivity

decreases across the period

increases down the group

nuclear charge

increases across the period

decreases down the group

metallic characteristics

increases from top left to bottom right

decreasese from bottom left to top right

electrons in spdf

s can hold 2 electrons

p can hold 6 electrons

d can hold 10 electrons

f can hold 14 electrons

max number of electrons per shell

2n^2

s block

groups 1 - 2 (+helium)

d block

groups 3 - 12 (transition metals)

p block

groups 13 - 18

f block

lanthoids and actinoids