Chemistry - Isotopes

HideShow resource information
What is an isotope?
Atoms of the same element with different number of neutrons. The atomic number remains the same however the atomic mass changes.
1 of 5
What is relative atomic mass?
Average mass of different isotopes in an element.
2 of 5
How do you work out relative abundance?
(mass of first isotope x % of first isotope) + (mass of second isotope x % of second isotope) Then divide result by 100
3 of 5
Work out the relative atomic mass of chlorine when there are 75% Cl-35 and 25% Cl-37
35.5 (working out on page 27 of collins chemistry txtbook)
4 of 5
Why can we not work out the average normally ( (x + y)/2)
Because the abundance is not split equally (50%)
5 of 5

Other cards in this set

Card 2

Front

What is relative atomic mass?

Back

Average mass of different isotopes in an element.

Card 3

Front

How do you work out relative abundance?

Back

Preview of the front of card 3

Card 4

Front

Work out the relative atomic mass of chlorine when there are 75% Cl-35 and 25% Cl-37

Back

Preview of the front of card 4

Card 5

Front

Why can we not work out the average normally ( (x + y)/2)

Back

Preview of the front of card 5

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Atoms resources »