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Answer to Question #19439 in Other Chemistry for adnan sabir

Question #19439
how many nuetrons and electrons will i have if i have 20 protons and my mass is 40?
Expert's answer
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)


mass number = 40 = # of protons + # of neutrons
atomic number = 20 = # of protons = # of electrons= #of neutrons

Therefore, the number of electrons is 20.

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