Question

Which of the following is a compound? Ne N2 NaCl O2

Answer 1

Ne because it it just a regular element (neon)

Answer 2

Answer:

NaCl, $N_2, O_2$

Explanation:

In chemistry, a chemical compound is a substance composed of the combination of two or more elements of the periodic table.

Ne: is an element of  the periodic table.

$N_2$: is a molecule

NaCl: is a molecule

$O_2$: is a molecule