Question

What block does the following element belong to: francium?

A) s-block
B) p-block
C) d-block
D) f-block

Answer 1

Francium is an alkali metal and belongs to the s-block of the periodic table, having its valence electrons in the 's' orbital (7s subshell).

Step-by-step explanation:

The element francium belongs to the s-block of the periodic table. The s-block consists of the first two columns on the left side of the periodic table, including the alkali and alkaline earth metals. Since francium is an alkali metal and occupies the group beneath cesium in the periodic table, it falls within the s-block, specifically in Group I.

Francium has its valence electrons in the 's' orbital, specifically in the 7s subshell, which is characteristic of the elements found in the s-block. Thus, the correct answer to the question is A) s-block.