An unknown element (called z) is being researched in the lab. scientists perform mass spectrophotometry on a sample of the element z and find the element has four isotopes (mass data below). use the data in the table to determine the average atomic mass of the unknown element z. isotope atomic mass abundance z - 24 23.985 amu 78.90% z - 25 24.995 amu 10.00% z - 26 25.982 amu 11.00% z - 28 27.967 amu 0.10% fun question. best answer 10 points. : ) show your work!

The average atomic mass is = ∑Mi X (Percentage)i / 100

Mi = atomic mass of isotope

Percentage = the percentage of that isotope

so for given

sotopeAtomic MassAbundance

Z - 2423.985 amu78.90%

Z - 2524.995 amu10.00%

Z - 2625.982 amu11.00%

Z - 2827.967 amu0.10%

The average atomic mass

= (23.985 X 78.90% + 24.995 X 10.00% + 25.982X11.00%  + 27.967 X 0.10%) / 100

= 24.3097 amu

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.

ill try to . no promises tho.

explanation: