the element be,mg,ca placed in the second group of periodic table their atomic size are 4,12,20 respectively. 1. write the electronic configuration. 2. write the valency exhibited by them. 3. which of 3 elements will be more reactive (size, nuclear charge).

the element be,mg,ca placed in the second group of periodic table thei

1.	the element be,mg,ca placed in the second group of periodic table their atomic size are 4,12,20 respectively. 1. write the electronic configuration. 2. write the valency exhibited by them. 3. which of 3 elements will be more reactive (size, nuclear charge).
Answer» 1S2 2S2 1s2 2s2 2P6 3s2 1s2 2s2 2P5 3s2 3p6 4s2

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the element be,mg,ca placed in the second group of periodic table their atomic size are 4,12,20 respectively. 1. write the electronic configuration. 2. write the valency exhibited by them. 3. which of 3 elements will be more reactive (size, nuclear charge).

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