Which of the following gases is NOT diatomic?

2016-07-13 1:44 am

a. hydrogen
b. helium
c. chlorine
d. nitrogen

回答 (1)

2016-07-13 2:41 am

...... The answer is : b. Helium

Helium (He) is monatomic.

Hydrogen (H₂), chlorine (Cl₂) and nitrogen (N₂) are diatomic.

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