Question

The mass of an atom is concentrated in its nucleus.​

Answer 1

Answer:

The mass of the atom is concentrated in the nucleus (protons and neutrons are about 2000 times as heavy as electrons). 2. The atomic number (the number of protons) determines which element an atom is. ... There are 9 protons, 10 neutrons and 9 electrons in an atom of Fluorine (its atomic weight is 19.00).

Explanation:

Answer :-Protons

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