Give the nuclear symbol for the isotope of gallium, ga, that contains 40 neutrons per atom. replace the question marks with the proper integers.

The nuclear symbol of an element have three parts namely:  

The general representation is as:

where X is the chemical symbol of the element, A is mass number of the element that is total number of neutrons and protons in the nucleus of an atom, and Z is atomic number of the element that is number of protons in the atom.

Element = Gallium,    (given)

Number of neutrons = 40 (given)

Let the nuclear symbol be . So, we need to determine the values of "?" in the symbol.

Atomic number of Gallium, = 31

Since, atomic number = Number of protons.

So, number of protons of Gallium, = 31

Mass number = number of protons + number of neutrons

Substituting the values:

Mass number =

So, the nuclear symbol is .

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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