Question

Calcium (Z=20) loses electrons successively to form Ca+ ,Ca²+ and Ca³+ ions. Which steps will have the highest I.E and why? ​

Answer 1

Answer:

calcium has outermost configuration of ns2 this meams it have 2 electrons in its valence shell.

and before ns2 there is a fully filled p subshell

so whn we will remove 2 electrons and will try to remove the 3rd electron then there will be huge energy reqd bcoz 2 electrons of outer shell are removed and now the p subshell is fully filled which is very stable so there will be huge energy requirement in removing 3rd electron