Question

several elements and compounds are given below. check all that apply. part 1 of 2 select the compound(s). □h₂o □o₂ □ch₄ □i₂

Explanation:

Step1: Recall compound definition

A compound is a substance made up of two or more different elements chemically combined.

Step2: Analyze each option

• $\ce{H2O}$ is composed of hydrogen and oxygen, so it is a compound.
• $\ce{O2}$ is made up of only oxygen atoms, it is an element (a di - atomic element).
• $\ce{CH4}$ is composed of carbon and hydrogen, so it is a compound.
• $\ce{I2}$ is made up of only iodine atoms, it is an element (a di - atomic element).

Answer:

$\ce{H2O}$, $\ce{CH4}$