Compare the number of valence electrons for each of the following molecules: A)  NH3      B) HCl      C)CO2     D) CH3COOH  

Expert Answers

An illustration of the letter 'A' in a speech bubbles

The number of valenc electrons found in a representative element is determined by which group it is in in the Periodic Table.

Hydrogen is in Group IA so it has 1 valence electron

Carbon is in Group IVA so it has 4 valence electrons

Nitrogen is in group VA so it has 5 valence electrons

Oxygen is in Group VIA so it has 6 valence electrons

Chlorine is in Group VIIA so it has 7 valence electrons.

So the molecule NH3 has 8 valence elctrons total (five from nitrogen and one each from three hydrogens)

HCl has 8 valence electrons

CO2 has 16 valence electrons

CH3COOH has 24 valence electrons (8 from carbons, 12 from oxygens, 4 from hydrogen)


See eNotes Ad-Free

Start your 48-hour free trial to get access to more than 30,000 additional guides and more than 350,000 Homework Help questions answered by our experts.

Get 48 Hours Free Access
Approved by eNotes Editorial Team