2.1.1 atomic structure and isotopes

Question 1

isotopes are…

Answer 1

atoms of the same element with the same number of protons but different number of neutrons

Question 2

give two properties of isotopes

Answer 2

• similar chemical properties

* same electronic structure

Question 3

relative isotopic mass is …

Answer 3

the mass of one isotope compared to one twelfth of the mass of one atom of carbon 12

Question 4

relative atomic mass is …

Answer 4

the average mass of an atom compared to one twelfth of the mass of one atom of carbon 12

Question 5

relative molecular mass is …

Answer 5

the average mass of a molecule compared to one twelfth of the mass on one atom of carbon 12

Question 6

give the names, relative masses and relative charges of the three sub atomic particles

Answer 6

proton 1 +1
neutron 1 0
electron 1/1800 -1

Question 7

calculating relative atomic mass with % abundance

Answer 7

isotopic mass x % abundance / 100

Question 8

calculating relative atomic mass with relative abundance

Answer 8

isotopic mass x relative abundance / total relative abundance

Question 9

calculating relative abundance

Answer 9

rearrange this equation

relative atomic mass = (isotopic mass x X) + (isotopic mass x 100-X) / 100