If an atom has the atomic number 4 and the atomic mass 9.012 it will have ________ electrons in the first energy level.

Question

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The atomic number of an element is equal to the number of protons in the nucleus of an atom of that element. The atomic mass of an element is equal to the total number of protons and neutrons in the nucleus of an atom of that element. The first energy level of an atom can hold a maximum of two electrons. Therefore, an atom with the atomic number 4 and the atomic mass 9.012 will have 2 electrons in the first energy level.

If an Atom Has the Atomic Number 4 and the Atomic