Question

Question 4 (a)
Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements?

Answer 1

Lithium, sodium, potassium are all metals present in group 1 of the periodic table. These metals are called the alkali metals. They have one electron in their outermost shell. Hence these metals react with cold water to liberate hydrogen gas.