Question

which element does the chart describe?
??????
. it is the lightest element in existence.
. in its purest form, it is found as a gas.
. it is reactive, or easily joined with other elements to create new material.
. it is the most common element in the universe.
. it is the simplest element.
. it is what causes the sun and stars to continue burning brightly.
. it is a very powerful and flammable material and can easily explode.
sodium
hydrogen
helium
oxygen

Explanation:

Hydrogen is the lightest, simplest, and most common element in the universe. It's a gas in pure form, reactive, and involved in stellar fusion powering the sun and stars. It's also flammable.

Answer:

B. hydrogen