Question

The atoms of metals have less than 4 valence electrons.

• A. True
• B. False

Answer 1

The correct option is A True

Valence electron -

• The electrons in the outermost shell, or energy level, of an atom, is known as valence electron.
• For example, oxygen has six valence electrons, two in the first shell and four in the second shell.
• Metals will form positive ions and to get a full outer shell by losing electrons, three seems to be the maximum number of electrons that can be lost (Al 3+).
• Elements in group 1 and group 2 are metals.
• Atoms of group 1 elements have one electron in their outer shell, and atoms of group 2 elements have two electrons in their outer shell.
• Some elements in groups 6 and 7, and all in group 0 (also known as group 8) are non-metals.
• Example - a) Sodium $\left(\mathrm{Na}\right)$ has electronic configuration= 2,8,1

$\mathrm{Na}\to {\mathrm{Na}}^{+}+1{\mathrm{e}}^{-}$

Here valence electron =1 , so by losing 1 electron it becomes Na⁺

In the same way, Mg and Al have +2 and +3 valency respectively.

Therefore, the given statement is true.