Which is the correct explanation on why more than half non-metal elements are in gaseous state under normal temperature?
A. The density of non-metal elements is usually lower.
B. Non-metal elements are usually heat and bad conductors.
C. The melting point and the boiling point of non-metal are usually low.
D. A, B & C all correct
E. Neither A, B nor C correct
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Sinh Học lớp 12
