The answer is 2 since the Oxygen is double bonded with a carbon O=C
A carbonyl group is any group where a carbon is double bonded to an oxygen. Carbonyl groups like aldehydes, ketones and carboxylic acids all contain only one double bond.
2
There is one lone pair of electrons on the nitrogen atom.
1
Two lone pair on the central selenium and three lone pairs on each chlorine. So total of eight lone pairs.
22APex
The Si has no lone pairs, but each F has 6 lone pairs. Thus 6 x 4 = 24 lone pairs, total.
Four pairs of electrons. Neon has a full octet.
2
There is one lone pair of electrons on the nitrogen atom.
If an atom has five valence electrons, it will have one lone pair of electrons.
There are 2 lone pairs in each Oxygen atom. So there are 4 lone pairs in total, which means 8 lone pair electrons.
There are three lone pairs present in chlorine atom
There is one lone pair of electrons on the nitrogen atom.
It has one lone pair left.
zero
2
2
There are four electrons, which is two pair.