Option (d) is the correct answer.
Valence electrons are the electrons present in outermost shell of an electron.
For example, bromine (Br) is a member of halogen family that is, group 17.
This means a bromine atom has seven valence electrons. This means that bromine has seven electrons available for bonding whereas in order to completely fill its octet bromine requires only one electron.
Thus, we can conclude that there are seven valence electrons available for bonding in bromine (Br).
Explanation:silicon is in 4A and it take four more to get to eight
Silicon is the element of group 14 and third period. The atomic number of silicon is 14 and the symbol of the element is Si.
The electronic configuration of the element silicon is:-
As seen from the electronic configuration, the number of valence electrons are four which are present in the 3s and the 3p shell.
These electrons in the silicon will be available for bonding.
The answer to this question will be:
b. examine and describe cells