Group 1 alkali metals, Group 7 halogens, Group 0 noble gases and the transition metals.
Group 1 — the alkali metals
Li, Na, K... have 1 outer electron; soft, low density, very reactive. They react with water → metal hydroxide + hydrogen (an alkali). Reactivity increases down the group (the outer electron is further out, more easily lost).
Viewing only
This content is free to read on superexams.com and cannot be printed or downloaded.
Read the full note, free
Create a free account to read this note in full. Every free account gets 2 complete revision notes, no card needed.