Question

What is the atomic number of the smallest metal(M) which hydroxide is given as MOH?

Answer 1

Answer:

lithium it's atomic number is 3

Explanation:

i hope this will help you

Answer 2

Answer:

The atomic number of the smallest metal is 3.

Explanation:

• Lithium is the first and the smallest metal according to the size of its atomic radii.
• It lies in 1A group in the periodic table.,
• It belongs to the s-block group.
• Its atomic number is 3.
• Its electronic configuration is- $1s^{2} 2p^{1}$
• It reacts with water to give off lithium hydroxide.
• $2Li + 2H_{2}O$ → $2LiOH + H_{2}$
• 2 moles of lithium atoms react with 2 moles of water molecules to give 2 moles of lithium hydroxide and 1 mole of hydrogen gas.