Question

1. set protons and neutrons to 6.

a. which isotope was created? carbon 12
b. what percentage of the element consists of this isotope? 98.93%
c. add a neutron. which isotope do you have now? carbon 13
d. what percentage of the element consists of this isotope? 1.07%
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Explanation:

A. The atomic number of carbon is 6 (number of protons). When protons = 6 and neutrons = 6, mass - number = protons+neutrons = 12, so it's Carbon - 12.
B. Carbon - 12 is the most abundant isotope of carbon, making up about 98.93% of all carbon.
C. When we add a neutron to Carbon - 12 (6 protons and 6 neutrons), we get 6 protons and 7 neutrons, which is Carbon - 13.
D. Carbon - 13 is a less abundant isotope of carbon, accounting for approximately 1.07% of all carbon.

Answer:

A. Carbon 12
B. 98.93%
C. Carbon 13
D. 1.07%