Question

To which period and group does chlorine belong to..

Answer 1

period= 3, group= 17

as Cl is a p-block element, it's group number=(number of valance shell electrons+10)

Cl has 7 valance shell electrons. So it's group number=7+10=17

And it has 3 shells. So it's belong to 3rd period.

Answer 2

Answer:

The element Chlorine belongs to the 17th group and the 3rd period.

Explanation:

• $Cl$ has a group number of (number of valence shell electrons+10) since it is a p-block element. It has seven electrons in its valance shell. So the group number is $7+10=17$, and there are three shells in it. As a result, it belongs to the third period. Chlorine is a chemical element with the atomic number which is 17 and the symbol $Cl$.
• It is the second-lightest element of the halogens, appearing in the modern periodic table between fluorine and bromine with its characteristics are generally halfway between them. At room temperature, chlorine is a yellow-green gas.