human
Question: Hydrogen is located on the left side of the periodic table in the same column as the alkali metals, but it has characteristics of a nonmetal. Which of the following is a physical property of hydrogen?

Choices:
A) Hydrogen can bond to itself.
B) Hydrogen makes positive ions.
C) Hydrogen is a gas at room temperature.
D) Hydrogen is combustible.
gpt
The correct answer is 2: Hydrogen is a gas at room temperature..