SC3c - Isotopes

Question 1

What is an isotope?

Answer 1

The same element that has a different mass

Question 2

What do atoms of an isotope have?

Answer 2

The same number of protons and electrons but different numbers of neutrons hence the different mass

Question 3

What is relative atomic mass?

Answer 3

The relative mass of the isotopes in an element

Question 4

What are the two isotopes of chlorine?

Answer 4

35. 37
    Cl. And Cl
36. 17

Question 5

When are isotopes describes as being stable?

Answer 5

If the ratio of protons to neutrons is correct

Question 6

What are two uses of stable isotopes?

Answer 6

Water and soil management and forensics

Question 7

What element on the periodic table has the greatest number of stable isotopes?

Answer 7

Tin with 10 stable isotopes

Question 8

How do we measure the mass of an atom?

Answer 8

Relative to that of carbon -12 because the masses are so small

Question 9

How do you calculate the relative atomic mass if given abundance of the isotopes if you take 100 atoms?

Answer 9

(% of isotope 1 x mass of isotope 1 ) + (the percentage of isotope 2 x mass of isotope 2) divided by 100