Chapter 2

Question 1

Relative atomic mass

Answer 1

The weighted mean mass of an element of an atom, compared with 1/12th the mass of a carbon 12 atom

Question 2

What is the mass of an electron

Answer 2

1/1836th the mass of a proton

Question 3

Isotope

Answer 3

Atoms of the same element with the same proton number but varying neutron numbers

Question 4

A

Z

Answer 4

Mass number

Atomic number

Question 5

How are isotopes chemically different ?

Answer 5

Higher mass
Higher melting / boiling point
Higher density
Slower diffusion

Question 6

Mass defect

Answer 6

Missing mass

Due to energy released during the formation of the nucleus

Question 7

Relative isotopic mass

Answer 7

The mass of an isotope relative to 1/12th of the mass of an atom of carbon 12

Question 8

How to find the RAM of isotopes

Answer 8

Need the percentage abundance

And the RIM of each isotope

Question 9

How does a mass spectrometer work?

Answer 9

Sample placed
Vaporised 
Ionised by electron beams 
Accelerated - separated 
Ions detected on mass spectrum as (mass to charge) m/z

Question 10

How to find relative atomic mass of isotopes?

Answer 10

(% x RIM) + (% x RIM) = RAM

Question 11

What are binary compounds?

Answer 11

Compounds that only contain 2 elements

Ends in - ide

Question 12

What are polyatomic ions?

Answer 12

Ions that contain atoms of more than 1 element bonded together

Question 13

Ammonium ion

Answer 13

NH4+

Question 14

Hydroxide ion

Answer 14

OH-

Question 15

Carbonate ion

Answer 15

CO3 2-

Question 16

Sulfate ion

Answer 16

SO4 2-

Question 17

Nitrate ion

Answer 17

NO3 -

Question 18

Hydrogen carbonate ion

Answer 18

HCO3 -

Question 19

Manganate ion

Answer 19

MnO4 -

Question 20

Dichromate ion

Answer 20

Cr2O7 2-

Question 21

Phosphate ion

Answer 21

PO4 3-

Question 22

Ate - Ite - ide

Answer 22

Ate - Ite = loses an oxygen

Ide = no oxygen