Which exerts greater pressure on the floor—standing flat-footed or standing on tiptoe? on tiptoe, because the force acts over less area on tiptoe, because the force acts over more area flat-footed, because the force acts over more area flat-footed, because the force acts over less area

The correct statement is on tiptoe, because the force acts over less area.

Explanation:

The pressure is illustrated as force per unit area. The pressure is determined in Pascal, that is, Newton per square meter. In case when one is standing on the tiptoe, then force imparted by the body stays the same, however, it now gets concentrated in a confined region. The pressure is determined by force divided by area. Thus, by minimizing the area, the pressure gets increased.

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.