The first ionization potential of Be and B will be:

1.  8.8 and 8.8
2.  6.6 and 6.6
3.  6.6 and 8.8
4.  8.8. and 6.6

An electronic configuration that has maximum difference between II and III ionization potential is:

1. 1s² 2s² 2p⁶ 3s¹

2. 1s² 2s² 2p⁶ 3s²

3. 1s² 2s² 2p⁶

4. 1s² 2s² 2p⁵

The correct order of $I^{st}$ IP(ionization potential) among the following elements Be, B, C, N, O is:

Incorrect order among the following is:

1. NH₃ < PH₃ < AsH₃ – Acidic

2. Li < Be < B < C – I^st Ionization potential

3. Al₂O₃ < MgO < Na₂O < K₂O - Basic

4. Li⁺ < Na⁺ < K⁺ < Cs⁺ - Ionic radius