Gallium (Ga) consists of two naturally occurring isotopes with masses of 68.926 and 70.925 amu. Part A. How many protons and neutrons are in the nucleus of isotope with mass of 68.926 amu? Express your answers as an integers. Enter your answers numerically separated by a comma. p, n = .
Part B. How many protons and neutrons are in the nucleus of isotope with mass of 70.925 amu? Express your answers as an integers. Enter your answers numerically separated by a comma. p, n = .
Part C. Write the complete atomic symbol for each, showing the atomic number and mass number. Express your answers as isotopes separated by a comma.

Part A. p, n = 31, 38.

Part B. p, n = 31, 40.

Part C.

Explanation:

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Part A.

In this case, since the atomic number for gallium is 31, we can say that the first isotope has also 31 protons and the neutrons are computed by using its molar mass as a whole number (69):

Thus, result is p, n = 31, 38.

Part B.

In this case, since the atomic number for gallium is 31, we can say that the second isotopes has also 31 protons and the neutrons are computed by using its molar mass as a whole number (71):

Thus, result is p, n = 31, 40.

Part C.

Finally, the isotopes as shown as:

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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.