What is the symbol and number of neutrons in one atom of each of these elements?Barium, Carbon, Fluorine, Europium, Bismuth, Hydrogen, Magnesium,...

For the list of elements provided, the atomic symbol and
the number of neutrons in the nucleus of each atom
is:

Barium’s symbol is Ba and the number of protons is
56

Carbon’s symbol is C and the number of protons is
6

Fluorine symbol is F and the number of protons is
9

Europium symbol is Eu and the number of protons is
88

Bismuth symbol is Bi and the number of protons is
125

Hydrogen symbol is H and the number of protons is
0

Magnesium symbol is Mg and the number of protons is
12

Mercury symbol is Hg and the number of protons is
120

(The number of neutrons is calculated by subtracting
the atomic number from the atomic mass, as atomic number is the number of protons and
atomic mass is the sum of the neutrons and protons in the
nucleus)