How many dots are shown in the electron dot diagram for calcium, in group ii and period 4 with 20 protons and 20 electrons?

Explanation:

It is known that dots present around the symbol of an element denotes the number of valence electrons present in the element.

For example, atomic number of calcium is 20 as it has 20 protons. So, its electronic distribution is as 2, 8, 8, 2.

Hence, it means that an atom of calcium contains 2 valence electrons and in order to attain stability it readily loses those two electrons.

Therefore, we can conclude that an electron dot diagram for calcium will have 2 dots around the symbol Ca.

sadness is not good

explanation:

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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