What is the commen in Helium and Argon?
A. Both elements are liquid metals
B. Both metals are used in balloons
C. Both have high diffusion rates
D. The outermost shells of both are fully filled
Answer: Option D
A. Both elements are liquid metals
B. Both metals are used in balloons
C. Both have high diffusion rates
D. The outermost shells of both are fully filled
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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