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alex41 [277]
3 years ago
6

How many neutrons does element X have if its atomic number is 39 and its mass number is 79?

Physics
1 answer:
bazaltina [42]3 years ago
6 0

Number of neutrons: atomic mass - atomic number

Element X's atomic mass is 79 and its atomic number is 39. Subtract 39 from 79 to find how many neutrons Element X has.

79 - 39 = 40

Element X has 40 neutrons.

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Answer:

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Explanation:

<u>Motion With Constant Acceleration </u>

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The formula to calculate the change of velocities is:

v_f=v_o+at

Where:

a   = acceleration

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t    = time

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\boxed{a=16\ m/s^2}

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3 years ago
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