chapter 1

Question 1

relative mass of electron

Answer 1

1/1840

Question 2

mass of proton/neutron

Answer 2

1.673 x 10^-27

Question 3

charge of proton

Answer 3

1.602 x 10^-19

Question 4

charge of electron

Answer 4

-1.602 x 10^-19

Question 5

Definition of relative atomic mass

Answer 5

mass of one of its atom relative to 1/12 mass of one atom 12C

Question 6

the electron configuration of Cr

Answer 6

1s^2 …… 4s^1 3d^5

Question 7

the electron configuration of Cu

Answer 7

1s^2 ……. 4s^1 3d^10

Question 8

reason for ionisation

Answer 8

• allow particles to accelerate
• ion can generate current in the detector

Question 9

electron bombardment

Answer 9

High-energy electrons fired from an electron gun
remove an outer shell electron from atom which create positive ion

Question 10

electrospray

Answer 10

the sample is dissolved in a volatile solvent. The sample is injected through a needle attached to the positive terminal of a high-voltage power supply. The molecules gain a hydrogen ion.

Question 11

1st ionisation energy

Answer 11

energy required to remove one electron from each atom in a mole of gaseous atoms producing one mole of 1+ gaseous ions

Question 12

factors affect ionisation energy

Answer 12

• distance
• nuclear charge
• shielding