mansoorahmedd67 mansoorahmedd67

28-09-2017
Chemistry

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An atom has 25 protons,20 neutrons, and 19 electrons.Which atom is this,What is the atom's mass number?

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jrussell1000 jrussell1000

28-09-2017

the atomic mass is 45

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freedom2259 freedom2259

28-09-2017

The atom is manganese

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