Carbon-11 decays by positron emission: 116c → 115b + 01e the decay occurs with a release of 2.87 ⋅ 1011 j per mole of carbon-11. when 1.00 g of carbon-11 undergoes this radioactive decay, g of mass is converted to energy.

of mass is converted to energy.

Explanation:

Mass of 1 mole of carbon-11 = 11 g

Moles of carbon-11 in 1 gram :

Energy released when 1 mol of carbon-111 undergoes positron emission: E

Then energy released when 0.0909 moles of carbon-11 undergoes positron emission:

Let the mass converted into energy during the process be m

Using Einstein equation of energy:

E = energy released

m = mass converted into energy

c = speed of the light

m =

of mass is converted to energy.

elements

explanation:

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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.