How many protons are in an atom of bismuth?

Answer 1

== The element bismuth has 83 protons. That's its atomic number. Remember that it's the number of protons in an element that determines the atomic number of that element. All atoms of bismuth have 83 protons. As to neutrons, the number of neutrons in bismuth atoms can vary. These other "flavors" of bismuth are its isotopes, and the numbers of neutrons in bismuth range from 101 to 135. It is bismuth-209 with 126 neutrons that represents all the natural bismuth we find. The rest of the isotopes are intentionally synthesized or created "incidentally" in nuclear reactions - like those in nuclear reactors, to cite one example. Links can be found below for more information. === ===

Answer 2

Each isotope of an element has a different number of neutrons.

Number of neutrons = Atomic Mass of the isotope - Atomic number of the element

The atomic number of barium is 56. The atomic number of bismuth is 83.

For lists of barium and bismuth isotopes see the links below.

Answer 3

125 neutrons

Answer 4

90