University:
High School
Course:
High School Chemistry
Academic year:

2023
Views:

20

Pages:

1
Author:

Rose G

Isotopes. Isotopes are the same except extra nevrons. They have the same number of protons but different number of neutrons. Same atomic number, different mass number Carbon 12 Carbon 13 C12 6 C 13 6 protons 6 protons 6 electrons 6 electrons 6 neutrons 7 neutrons Relative Atomic = Sum of (isotope abundance X isotope mass no.) Mass (Ar) Sum of abundances of all the isotopes. Example CU-63-abundance of 69.2% CU-65-abundance of 30.8%. (69.2×63) +(30.8×65) - 6361.6 =63.616 69.2 +30.8 100 = 63.6