B. a nucleus with a positive charge.
A carbon-12 atom has 6 protons (6P) and 6 neutrons (6N). But some types of carbon have more than six neutrons. We call forms of elements that have a different number of neutrons, isotopes. For example, carbon-14 is a radioactive isotope of carbon that has six protons and eight neutrons in its nucleus.
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I believe it is D. Hope this helps you!
Answer:
A. 2 bonds
Explanation:
If you see a charch of ci20 it would easily show the answer.
