Question

Write the balanced chemical equations for each of the following

(a) Element X is a metal with valency 2, Y is a non metal with valency 3.

(i) Write an equation to show how $Y$ forms an ion.

Answer 1

Step 1:

Balanced chemical equation for condition 1:

• Metals have the tendency to lose electrons.
• $X$ is a metal loses two electrons and forms $X^{2+}$cation.

The balanced chemical equation is:
$X\to X^{2+}+2e^{-}$

Step 2:

Balanced chemical equation for condition 2:

• $Y$is a non metal gains 3 electrons and forms $Y^{3-}$ anion

The balanced chemical equation is:

$Y+3e^{-}\to Y^{3-}$

Conclusion:

Non metals have the tendency to gain electrons and complete octet.

Y will form an anion by gaining 3 electrons

$Y+3e^{-}\to Y^{3-}$