Question

Plz ans que no.51........explain

Answer 1

Answer:

1)S, Cl

Explanation:

Sulphur and Chlorine have a similar atomic mass because they are adjacent to each other in the same period and differ by only one group

Whereas, in the other options, the elements differ by periods which adds up an extra shell for each period.

Hope this helps

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Answer 2

Answer:

(1) S,Cl has almost similar size

Explanation:

S,Cl are similar in size because they are in same period . Generally atomic size is decreases from left to right in a period . so they are in similar size .