Multiple choice

Directions: Fill in the blank with the correct option.

__________ is both the simplest and the most abundant element in the universe.

  1. The hydrogen

  2. A hydrogen

  3. An hydrogen

  4. Hydrogen

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Chemical elements generally do not take a definite or indefinite article when referred to in a general sense. 'Hydrogen' is the correct noun to use as the subject.