"Is the number of particles per mole dependent on the kind of atom/element? Why or
why not?"

see explanation

Explanation:

The mole is defined as the mass of substance containing one Avagadro's Number of particles. That is => 6.023 x 10²³ particles. The mass is always the formula weight of the substance. So no, the number of particles per mole does not depend on the kind of substance. It is always 6.023 x 10²³ particles of specified substance per formula weight.

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is and electronic configuration of phosphorous is .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.  

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.

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