6 + -15 + -24 + 3 + -25
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5
-55
____
5
-11 is your answer!
Answer:
The correct option is C: the isotope of iodine contains 81 neutrons.
Step-by-step explanation:
The mass (A) of the iodine isotope is given by:

Where:
Z: is the number of protons
N: is the number of neutrons
For iodine Z= 53, so if A = 134 the number of neutrons is:

Therefore, the correct option is C. The isotope of iodine contains 81 neutrons.
I hope it helps you!
Answer:
12 to the second power.
Step-by-step explanation:
Answer:
(A) I think
Step-by-step explanation:
We you divide x12 and y18,12=4 y=6. Then you take +1 and change it to -1. It should bring you to answer A.
I hope I'm right and I hope this helps:)!