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?

17
16
2
1

The given element is F and the Fluorine is present in the group 7A, also termed as 17.

Option A

Explanation:

It is known that periodic table comprises of periods and groups. In other words, the elements in periodic table can be classified based on their arrangement or positioning in the periods and groups. Mostly groups are used for categorizing the elements in the periodic table. So each group consists of elements present in a same column. And those elements are said to have same number of valence electrons. Even the groups are numbered based on the valence numbers of elements present in that group.

Like, the elements in s blocks are termed as group 1 , group 2 depending upon the column of elements containing 1 valence electron and 2 valence electron, respectively.

In the present problem, the electronic configuration can be written as 1s² 2s² 2p⁵. So this means the number of valence electrons is 7.

It is known that in periodic table there are two groups have the name containing 7 that is group 7 and group 7 A. Among the group names given in the options and the electronic configuration, it can confirmed that the group number of the given element is 7A or 17 (7+10=17). As these group have p valence shells, so it is also termed as p block elements. And the group number of p-block elements can also be written as addition of 10 to the valence electrons. So 7+10 = 17 is obtained as group number for Group 7 A.

Thus, the given element is F and the Fluorine is present in the group 7A, also termed as 17.

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a