how many nuetrons and electrons will i have if i have 20 protons and my mass is 40?
1
Expert's answer
2012-11-27T08:04:42-0500
The mass number = number of protons + neutrons (the heavier parts of an atom) The atomic number = number of protons (which also equals the number of electrons)
So,
mass number = 40 = # of protons + # of neutrons atomic number = 20 = # of protons = # of electrons= #of neutrons
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