Question

The element with electron configuration 1s2 2s2 2p6 3s2 3p1 belongs to a. p-block, period 3, group II b. p-block, period 3, group III c. s-block, period 3, group III d. s-block, period 3, group I

Answer 1

It belongs top block, group 13 or III and period 3.

• The element with electron configuration 1s2 2s2 2p6 3s2 3p1 is Al as its total electron is 13.
• Al is a metal of group 13.
• It is a good conductor of heat and electricity.
• It resides in period 3 of the modern periodic table.
• It also resides at group 13 which is sometimes denoted as group III.
• It is a p block element.
• Thus, the correct option is b. p-block, period 3, group.