If an atom has an atomic number of 9 and an atomic mass number of 19, how many protons, neutrons, and electrons does it have?

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If an atom has an atomic number of 9 and an atomic mass number of 19, how many protons, neutrons, and electrons does it have?

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Answer 1 · 2015-10-19T03:08:00

This isotope of fluorine has 9 protons, 9 electrons and 10 neutrons.

Explanation:

The atomic number is the number of protons $(p^{+})$ $("p"^+")$ . In a neutral atom, the number of electrons $(e^{-})$ $("e"^(-)")$ equals the number of protons. Mass number is the sum of the protons and neutrons $(n^{0})$ $("n"^0")$ of a particular isotope. If you have mass number and atomic number, subtract the atomic number from the mass number to get the number of neutrons. $(Mass number) - (atomic number) = number of neutrons$ $("Mass number") - ("atomic number")="number of neutrons"$ .

There are:
9 protons
9 electrons
10 neutrons

Fluorine is the element in question, as its atomic number is $9$ $9$ . You would name this particular isotope using the mass number. It would be called fluorine-19.

The nuclear or isotopic notation would be $_{9}^{19} F$ $""_9^19"F"$ .

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If an atom has an atomic number of 9 and an atomic mass number of 19, how many protons, neutrons, and electrons does it have?

1 Answer

Explanation:

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