Atoms have negatively charged particles called electrons and positively charged particles called protons . If an atom loses an electron it has a positive electric charge. If it gains an electron it has a negative electrice charge .Which integer would represant the electric change of an atom that has an equal number of electrons and protons

When the atom has the equal number of electrons and protons the total charge on the atom is zero. It does not have negative or positive charge. the integer 0 indicates that the atom has equal number of electrons and protons and has no charge on it.

The change of electric charge on the atom is represented by a positive or negative number .

When the atom losses an electron a positive charge is obtained depending on the number of electrons lost . But when the atom gains an electron the atom has a negative charge . Again the number of negative charges depends on the number of electrons gained.

Sodium has 11 electrons and 11 protons. But if it losses an electron it gains a single + charge.