2. C. N2 and CN- (N2 has 10 electrons, CN- has 8 electrons)
3. C. N2O4 (contains 36 total valence electrons)
4. C. Two lone-pair of valance electrons and one bonding site.
2. Which one of the following pair of molecules or species is not isoelectronic pair?
A. CO and N2 B. NH3 and H3O+ C. N2 and CN- D. CO2 and SO2
3. Which covalent molecule contains more number of total valance electrons than the others?
A. SO4 -2 B. NH4+ C. N2O4 D. CO2
4. Which of the following is the correct Lewis Structure for oxygen atom?
A. The three lone-pairs of valance electrons.
B. One lone-pair of valance electrons and one bonding site.
C. Two lone-pair of valance electrons and one bonding site.
D. Two lone-pair of valance electrons and two bonding site.
1 answer