He has an atomic number of 2. The number of equals the number of , it has electrons.

Determine the percent sulfuric acid by mass of a 1.61 m aqueous solution of h2so4. %

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.

What happens to the atomic radius when an elctron is lost