Atoms of which element have two protons and two electrons?

1 Answer
anor277
Jan 9, 2017

If the atom has #"2 nucular protons"#, the atom is ...........

Explanation:

If the atom has #"2 nucular protons"#, the atom is #"helium."#

The identity of the atom is determined by its atomic number, #Z#, which is equal to the number of massive, positively charged particles, #"protons"#, that its nucleus contains. #Z=1#, the atom is #"hydrogen"#; #Z=2#, the atom is #"HELIUM"#; #Z=3#, the atom is #"lithium"#;...................

You should have access to Periodic Table. It will tell you the atomic number, and the atomic mass, for all the elements............

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