There are always two protons.
The most common isotope of Hydrogen lacks a neutron in its nucleus. But there is an isotope, called deuterium, that has one neutron. Additionally, there is a hydrogen isotope that is artificially created that has two neutrons in its nucleus. It is called tritium. A link to the Wikipedia article on the isotopes of hydrogen is provided.
The splitting of a nucleus atom
Matter
Atomic Number
mass
Every police department will have a different phone number. However, if immediate police assistance, 911 is the number that does not change, no matter the location.
whats the shape of the pararel lines o latud
It means "What's Up?". also Whats wrong, or whats the matter
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oh, its alright. Don't matter whats on the outside matters whats in the inside.
no matter whats happen in life
no whats ther matter with you