Question

what is the lightest element in solar system.

Answer 1

Hydrogen, most abundant in the universe, is the chemical element with atomic number 1, and an atomic mass of 1.00794 amu, the lightest of all known elements. It exists as a diatomic gas (H2). Hydrogen is the most abundant gas in the universe.

Answer 2

Hydrogen is the lightest element in solar undiverse with atomic number 1 and atomic mass of 1.00794(approx)amu.and this is the most abundant gas. Hope this helps.pls mark as brainliest...