Chlorine gas contains two chlorines that are held together by a bond which is the best classification for chlorine gas.? a. atom b. molecule c. element d. compound

Explanation:

An atom is smallest unit of a matter or substance.It consist of three subatomic particles : electrons, protons, neutrons.

Element is a pure substance which is composed of atoms of similar elements.  Example: Hydrogen (H).

Molecule is a pure substance formed by combination of atoms of similar elements called as molecule of element. Example: Hydrogen molecule , Chlorine molecule

The combination of atoms of different elements is called as molecule of compound. Example: Water

Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.  Example: Water

the answer is 0.42 is that is an option. this question provides no info