is expected to have the largest second ionizatione (a) 1s2 2s2 2p6 3s (b) 1s2 2s
ID: 1036278 • Letter: I
Question
is expected to have the largest second ionizatione (a) 1s2 2s2 2p6 3s (b) 1s2 2s2 2p6 382 (c) Is2 2s2 2p 3s2 3p (d) Is2 2s2 2p6 3s2 3p4 (e) 1s2 2s2 2p6 3s2 3p5 1) *The electron configurations of five different are shown below. Which of these elements Cerg (IE2)** formate ion (HCO2) is shown below. Which statement best describes the bonding character of this ion?** (a) One double bond and two single bonds (b) One double bond and two delocalized single bonds (c) Three equivalent 1/s bonds (d) One single bond and two equivalent 1% bond (e) 007 James Bonds 3) "Which of the following species has a T-shaped molecular geo geometry (MG)? (a) ICh (b) NH3 (c) 03 (d) sog2.Explanation / Answer
1. OPTION a. Half-filled and fully filled orbitals have the highest stability and so ions and atoms tend to arrange their electrons to achieve this stability. In case of the first configuration, the second ionization means removing an electron from the fully-filled thus quite stable p-orbital. Others involve second ionizations that give rise to a half-filled orbital and so require less energy for the process as the ions by themselves favour the second ionization in the other cases.
2. OPTION b. Formate ions consists of one negative charge on the oxygen atom which transferred to the other oxygen also through resonance. This gives the most stable Lewis structure with one C-H bond and two C-O partial double bonds and thus all have the least possible formal charge.
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