In an atom, what is true about neutral atom numbers?

In an atom, what is true about neutral atom numbers?

• A. Protons double electrons
• B. There are no neutrons
• C. Electrons are more numerous than protons
• D. Numbers of protons and electrons are equal

Answer: (D)

In a neutral atom the total positive charge from protons balances the total negative charge from electrons, so the numbers of protons and electrons are equal. Neutrons, which carry no charge, can be present and affect mass but not neutrality, so the idea that there are no neutrons isn’t correct. If protons outnumber electrons, or if electrons outnumber protons, the atom would have a net charge rather than be neutral. Equality of protons and electrons is what gives a neutral atom its zero overall charge.

In a neutral atom the total positive charge from protons balances the total negative charge from electrons, so the numbers of protons and electrons are equal. Neutrons, which carry no charge, can be present and affect mass but not neutrality, so the idea that there are no neutrons isn’t correct. If protons outnumber electrons, or if electrons outnumber protons, the atom would have a net charge rather than be neutral. Equality of protons and electrons is what gives a neutral atom its zero overall charge.