Question

Consider the following elements :
20Ca, gO, isAr, 16S, 4Be, 2He Which of the above elements would you expect to be :
(i) very stable ? (ii) in group 2 of the periodic table ?
(iii) in group 16 of the periodic table ?

Lakhmir Singh Chemistry Class 10

Answer 1

Hey !

Here is your answer !
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18Ar and 2He ( noble gases )
20Ca and 4Be
8O and 16S

Answer 2

heya

here is ur answer

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(1).

♦ helium -2

♦ Argon - 18

✒these two elements are said to be stable because they have stable configuration

(2)

♦ ca - 20

♦ Be-4

✒these two elements fall under group 2 because the elements in group 2 have 2 as valency.

✒Ca,and ,Be both have 2 as their valancy.

(3)

♦ O -8

♦ S-16

✒these two elements fall under group 16 because the elements of this group readily accepts 2 electrons to become stable.


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hope it helps u..!!

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