Atoms— normally have no charge? are made of ions and electrons? are made of electrons, protons, and neutrons
answer quick and it is select all that apply

Atoms have no charge.Atoms are made of proton,neutron and electron

Explanation:

An atom is the smallest part of an element and take part in chemical reaction .Atom contain nucleus in its centre that have positively charged proton and neutron which is neutral.An electron cloud is present outside the nucleus.

            Electrons are generally negatively charged.An atom is neutral because they contain equal number of proton along with equal number of electron.

             Whwn an atom releases or accept electrons it is converted into ions.

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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