The number of neutrons in dipositive zinc ion with mass number $70$ is:

34

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36

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38

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40

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Solution

The correct option is D $40$ `
In $_{30} Z n^{70},$

$Z n^{2 +}$ has no. of neutrons $= 70 - 30 = 40$

Hence, option D is correct.

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The number of neutrons in dipositive zinc ion with mass number 70 is:

The correct option is D 40`In 30Zn70,Zn2+ has no. of neutrons =70−30=40Hence, option D is correct.

The number of neutrons in dipositive zinc ion with mass number $70$ is:

The correct option is D $40$ `
In $_{30} Z n^{70},$

$Z n^{2 +}$ has no. of neutrons $= 70 - 30 = 40$

Hence, option D is correct.