In: Chemistry
Nonmetals gain electrons under certain conditions to attain a noble gas electron configuration.
How many electrons must be gained by the element oxygen (O) to attain noble gas electron configuration?
number of electrons: _______
Which noble gas electron configuration is attained in this process?
neon
argon
krypton
radon
xenon
helium
Number of electrons : 2
Noble gas configuration : Neon
Explanation
Atomic number of Oxygen is 8
Electronic configuration of oxygen is 1s2 2s2 2p4
Outer most shell (n=2) is not filled completely in this electronic configuration , two electrons are needed to completely fill the outer most shell. So, oxygen make compounds by gaining two electrons.
Atomic number of Neon is 10
Electronic configuration of Neon is 1s2 2s2 2p6
In this electronic configuration outermost shell is completely filled, so neon no need to gain or lose electrons and it will not make compounds.