Alkali

Group VII

Alloys

Halogens

They are relatively soft metals

The corrode quickly when exposed to air

They react very quickly with water releasing hydrogen gas

They produce acidic solutions in reaction with water

Potassium is more dense than lithium

Lithium has a higher density than sodium

Potassium is less reactive than sodium

The melting point of sodium is higher than lithium

Decreasing distance between the nucleus and outer shell makes it easier for the atom to attract electrons

Increasing distance between the nucleus and outer shell makes it easier for the atom to attract electrons

Decreasing distance between the nucleus and outer shell makes it harder for the atom to attract electrons

Increasing distance between the nucleus and outer shell makes it harder for the atom to attract electrons.

Decreasing distance between the nucleus and outer shell makes it easier for the metals to lose their valence electrons

Increasing distance between the nucleus and outer shell makes it harder for the metals to lose their valence electrons

Increasing distance between the nucleus and outer shell makes it easier for the metals to lose their valence electrons

Decreasing distance between the nucleus and outer shell makes it easier for the metals to lose their valence electrons