Question

identification of ions at least long ​

Answer 1

Explanation:

Li

−

:1s

2

,2s

2

;Be

−

:1s

2

,2s

2

,2p

1

. In Li, addition of electron has taken place in 2s orbital; in Be

−

, addition of electron has taken place in 2p orbital loosing its 2s completely filled configuration.

EA

1

for Be is more positive than EA

1

for Li.

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