isotopes

Question 1

isotopes

Answer 1

an element with the same number of protons but a different number of neutrons

Question 2

do isotopes have same or different atomic and mass numbers?

Answer 2

same atomic number, different mass number

Question 3

relative atomic mass (Ar)

Answer 3

an average mass taking into account the different masses and abundances of all the isotopes that make up the element

Question 4

calculate Ar

Answer 4

(mass isotope 1 x abundance) + (mass isotope 2 x abundance)/100