I have been trying to figure it out form 20 min and I am going insane and this is just not my subject. If you can can you explain to me how you got the answer.
If the number of electrons in an atom is 35 and its mass number is 80, calculate the following:
a. The number of protons.
b. The atomic number.
c. the number of neutrons.
2007-09-04 14:19:47 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
If you have a neutral atom, not an ion, then the number of electrons is equal to the number of protons, which is the atomic number.
35 electrons, so 35 protons.atomic number 35
you find neutrons by subtracting the atomic number from the atomic mass.
80 -35= 45 for number of neutrons.
Your element is bromine.
2007-09-04 14:30:18 · answer #1 · answered by science teacher 7 · 0⤊ 0⤋
Since the problem did not state whether or not this atom is an ion, we may assume that the number of protons is equal to the number of electrons,
Protons = 35
Protons and neutrons each have an atomic mass of one, so to find the number of neutrons you subtract 35 from 80.
Neutrons = 45
The atomic number, I believe, is the same as the number of protons
Atomic Number = 35
2007-09-04 21:31:03 · answer #2 · answered by Ipsulis 3 · 0⤊ 0⤋
If the atom is neutral (not an ion) then the protons = the number of electrons
The atomic number = the number of protons.
The atomic mass is basically the protons + neutrons. So if you now have the number of protons, then you have the number of neutrons as well.
2007-09-04 21:30:16 · answer #3 · answered by reb1240 7 · 0⤊ 0⤋