Problem

An atom of a certain element has 4 protons and 5 neutrons. If the atom is neutral, how many electrons does it have?

Answer

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Answer

Step 2: In this case, the atom has 4 protons, so it must have 4 electrons.

Steps

Step 1 ：Step 1: Recall that in a neutral atom, the number of electrons equals the number of protons.

Step 2 ：Step 2: In this case, the atom has 4 protons, so it must have 4 electrons.

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