Question

Which element is classified as an alkali metal?

Answer 1

The alkali metals are a group (column) in the periodic table consisting of the chemical elements lithium (Li), sodium (Na), potassium (K), [note 1] rubidium (Rb), caesium (Cs), [note 2] and francium (Fr). 

Answer 2

Explanation:

All the elements of group 1 in the periodic table are known as alkali metals. These are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (fr).

Characteristics of alkali metals are as follows.

• Alkali metals are soft and can be cut with a knife.
• They are good conductors of heat and electricity.
• They have only 1 electron in their outermost sub-shell.
• They are very reactive.
• Alkali metals are ionic in nature.