The diagram shows the electron configuration of an atom of an element for the electrons in the s and p orbitals. what is the group number of the element in the periodic table? a. 17 b. 16 c. 2 d. 1

A. 17

Explanation:

Periods and Groups are key to remember

Periods are horizontal rows while

Groups are vertical rows

There are 9 valence electrons within this configuration

The Electron Configuration for said diagram is 1s^2,2s^2,2p^5

Fluorine is the element that said diagram represents

The group in which Fluorine is in, is Group 17. More notably 7A.

Answer : The correct option is, (A) 17

Explanation:

Group : A column in the periodic table is known as group.

The common features about the elements of a same group is that the each groups has elements with the same number of valance electrons.

As we know that if the element belongs to s-block, its group number = Number of valence electrons (or outermost shell electrons).

As we know that if the element belongs to p- block then the group number = no. of valence electrons + 10

From the given diagram of electronic configuration of an atom we conclude that, there are 7 valence electrons present in their outermost shell. So,

Group number = Number of valence electrons + 10

Group number = 7 + 10 = 17

Hence, the group number of the element in the periodic table is, 17.