Question

1. set protons and neutrons to 6.

a. which isotope was created?
b. what percentage of the element consists of this isotope?
c. add a neutron. which isotope do you have now?

Explanation:

Step1: Identify the element by proton number

The number of protons determines the element. With 6 protons, the element is carbon. Isotopes are named by mass - number (sum of protons and neutrons). Here, mass - number = 6 (protons)+6 (neutrons)=12. So the isotope is carbon - 12.

Step2: Recall the abundance of carbon - 12

Carbon - 12 makes up about 98.93% of all carbon on Earth.

Step3: Determine the new isotope after adding a neutron

If we add a neutron, the new mass - number is 6 (protons)+7 (neutrons)=13. So the new isotope is carbon - 13.

Answer:

A. Carbon - 12
B. 98.93%
C. Carbon - 13