Question

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.

Answer 1

Answer:

Part A. p, n = 31, 38.

Part B. p, n = 31, 40.

Part C. $^{69}_{31}Ga,\ ^{71}_{31}Ga$

Explanation:

Hello,

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):

$neutrons=mass-protons=69-31=38$

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):

$neutrons=mass-protons=71-31=40$

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

Part C.

Finally, the isotopes as shown as:

$^{69}_{31}Ga,\ ^{71}_{31}Ga$

Best regards.