Question

An element X has valency 2. Write formula of its hydroxide and carbonate.

Answer 1

Answer:

hydroxide calcium mark me brainlist

Answer 2

An element X with valency two is Calcium.

Explanation:

• The hydroxide form is calcium hydroxide $\[Ca{(OH)_2}\]$.
• The carbonate form is calcium carbonate $\[CaC{O_3}\]$.
• Calcium releases two electrons from its outermost shell and the carbonate ion accepts two electron.
• As the hydroxide ion accepts only one electron, therefore it will take two hydroxide ions to accept electron from one calcium ion.

Calcium valency is two. $\[C{a^{2 + }}\]$

Hydroxide valency is one. $\[O{H^ - }\]$

Carbonate valency is two. $\[CO_3^{2 - }\]$