Elements with atomic numbers 10, 18, 36, 54 . . . . . . . .
A. Rare soil metals
B. Light metals
C. Halogen
D. Inert gases
Answer: Option D
A. Rare soil metals
B. Light metals
C. Halogen
D. Inert gases
Answer: Option D
Red phosphorus is less reactive than yellow phosphorus because
A. it is red in colour
B. it is highly polymerised
C. it is insoluble in C2H5OH
D. it is hard
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