Question #8c246

1 Answer
Arnav
Dec 13, 2016

Atomic number, Z = 1.

Explanation:

The atomic number of an element is the number of protons one of its atom contains.
One neutral atom of Hydrogen contains one electron, one proton and 0,1,2 or 3 neutrons depending on which isotope it is.

Fact: Even though Hydrogen is so small, it constitutes 75% of the elemental mass of the whole universe!

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