What can we say if the Rf values of a reference and a spot match in all solvents? It's very likely that the mixture contains the reference
compound
It's proven that the mixture contains the reference
compound
It's likely that the mixture's only component is the reference
compound
It's certain that the mixture does not contain the reference
compound
Choose an answer

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.

mark him as !

i believe that it is a exoplanet

dynamic equilibrium is the answer.