3 years ago

what is the mass number of an ion with 109 electrons 159 neutrons and a +1 charge? Express your answer as an integer

1 answer:

6 0

Z=atomic number (number of protons)
The number of protons is similar to the number of electrons when the atom doesn´t have charge.
In this case :
"+1 charge" means that this atom would must have 1 electron more to be neutral, therefore the number of electrons of this element would be 109+1=110.

A=Z+N
A=mass number
Z=110 u
N=159 u

A=110 u + 159 u=269 u

Answer: the mass number (A) would be 269 u

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The attached figure shows the diagram of the given question.

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From the figure, 8, 7, 9, 10, 12, and 11 are the angles that are on the same transversal. 8, 7, 9, 10, and 12 are just exterior. It means that 11 is the alternate exterior of angle 5. So, only one angle is alternate exterior angles with angle 5.