Question

atomic mass. in other words, isotopes have the same number of proton an isotope is identified by its mass number, the sum of t common isotope of carbon has a mass number of 12 and isotopes are carbon - 13 and carbon - 14. despite their dif react the same way chemically. part i. answer the questions based on the above re 1. what is an isotope? atoms of the same element with but different numbers of neutror 2. what does the number next to isotopes signify? the mass - number, which is the in the nucleus. 3. how can you tell isotopes of the same element apart? by their mass - numbers (or the part ii. for each of the following isotopes, write the electrons. assume all atoms are neutral. | | carbon - 12 | carbon - 13 | carbon - 14 | | # of protons | | | | | # of neutrons | | | | | # of electrons | | | |

Explanation:

Step1: Recall atomic - number property

For carbon, the atomic number (number of protons) is 6. Since isotopes are of the same element, the number of protons for Carbon - 12, Carbon - 13, and Carbon - 14 is 6.

Step2: Calculate number of neutrons

The mass number = number of protons+number of neutrons. For Carbon - 12, number of neutrons = 12 - 6=6; for Carbon - 13, number of neutrons = 13 - 6 = 7; for Carbon - 14, number of neutrons = 14 - 6=8.

Step3: Determine number of electrons

In neutral atoms, number of electrons = number of protons. So for all three carbon isotopes, the number of electrons is 6.

Answer:

	Carbon - 12	Carbon - 13	Carbon - 14
# of neutrons	6	7	8
# of electrons	6	6	6