Answer:
a) 50 protons, 50 electrons, 75 neutrons
Explanation:
How many protons, electrons, and neutrons does an atom with atomic number 50 and a mass number of 125 contain?
a) 50 protons, 50 electrons, 75 trons
b) 75 electrons, 50 protons, 50 neutrons
c) 120 neutrons, 50 protons, 75 electrons
atomic number IS the number of protons
atomic mass IS the total of protons + neutrons
so 50 protons
125-50 = 75 neutrons
in a neutral atom,
number of negative electrons = number of positive protons
a) 50 protons, 50 electrons, 75 neutrons
