Question

Consider the following elements 20A,8B 16C,4E,2F.
Which of the above is(a)more stable(b)in group 2 of perodic table.

Answer 1

Explanation:

in group 2

223Ra

224Ra

226Ra

228Ra radium most stable element

Answer 2

Answer:

(i) 2F and 18C are very stable elements because they contain 2 and 8 electrons in the outermost shell.

(ii) Elements 4E and 20A are in group of 2 of the periodic table because E has the electronic configuration 2, 2 and A has electronic configuration 2, 8, 8, 2. Both have 2 electrons in the outermost shell.

Explanation:

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