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Alom A has an atomic number of 19 and mass number of 40 Atom B has an atomic number of 20 and a mass number of 40 Which of these is an accurate statement?​

Respuesta :

abdulgafaryusuf9

Answer:

Statement 2-Atom B has an atomic number of 20 and a mass number of 40

Explanation:

mass number = the sum of protons and electrons

Atom A would be an isotope ( which I don't think exist )

Answer: Atom A has one less atom then atom B

Explanation:

I took the test and made a 100

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