UPSC Chemistry-Elements Classification and Chemical Bonding Set 1

Mendeleev ✘ Lother Meyer ✘ Lavoisier ✘ Henry Moseley ✔

seven periods and eight groups ✘ seven periods and eighteen groups ✘ eight periods and eighteen groups ✘ eighteen periods and eight groups ✔

Sodium ✘ Calcium ✘ Aluminium ✘ Silicon ✔

Oxygen ✘ Nitrogen ✘ Chlorine ✘ Sulphur ✔

H, Be ✘ Na, Mg ✘ B, Si ✘ K, Ca ✔

Br ✘ CI ✘ F ✘ I ✔

Na, Si, CI ✘ Be, Mg, Ca ✘ F, CI, I ✘ Li, Na, Be ✔

2, 8 ✘ 2, 18 ✘ 1, 8 ✘ 1, 18 ✔

A, B, C ✘ B, C, D ✘ A, D, E ✘ A, B, E ✔

They are non-metallic in nature ✘ They exist in atomic form ✘ They are radioactive in nature ✘ Xenon is the most reactive among them ✔