AP BIOLOGY

Detailed explanation-1: -Negative and positive charges of equal magnitude cancel each other out. This means that the negative charge on an electron perfectly balances the positive charge on the proton. In other words, a neutral atom must have exactly one electron for every proton.

Detailed explanation-2: -Protons and neutrons have nearly equal masses, but they differ in charge. A neutron has no charge, whereas a proton has a positive charge that exactly balances the negative charge on an electron.

Detailed explanation-3: -All atoms have the same number of electrons as protons, so the positive and negative charges “cancel out", making atoms electrically neutral. Unlike protons and neutrons, which are located inside the nucleus at the center of the atom, electrons are found outside the nucleus.

Detailed explanation-4: -Therefore, the statement is true.

Detailed explanation-5: -Protons and electrons follow specific laws of attraction. Since they have opposite charges, they attract to one another. If an atom has the same number of protons as electrons, then the atom is balanced, and stable. The orbiting electrons remain in their orbits as long as nothing upsets the balance.