If an atom has 9 protons and 10 neutrons, what is its atomic number?
1 Answer
Mar 19, 2016
The number of neutrons is obtain through the difference of the mass number and the number of electrons.
Explanation:
By looking at the periodic table, you will see that Fluorine has 9 protons.
Since the number of electrons equal the number of protons, Fluorine has 9 electrons as well.
Meanwhile, it's mass number of 19, minus 10 neutrons, gives you 9 protons or electrons. Hence, the atom would be Fluorine.
As for the atomic number, it is obtainable through the periodic table itself.
