Characteristic of atoms

Question 1

Atomic weight

Answer 1

mass of relative to one atom of another. define one isotope of an element as the standard against which others are measured. (12-C = standard)

Question 2

Mass #

Answer 2

number of proton and neutron (exact number)

Question 3

Isotope

Answer 3

same number proton, different neutron

Question 4

Calculate Average atomic mass (Amu)

Answer 4

(Mass of isotope1 x % abundance) + (Mass of isotope2 x % abundance) + etc = Amu