Chapter 2

Question 1

Proton’s relative charge and relative mass

Answer 1

+1 and 1

Question 2

Neutron relative charge and relative mass

Answer 2

0 and 1

Question 3

Electron relative charge and relative mass

Answer 3

-1 and 1/1836

Question 4

Number of protons, neutrons and electrons in ¹⁸O²–

Answer 4

8, 10, 10

Question 5

Number of protons, neutrons and electrons in ⁴¹K

Answer 5

19, 22, 19

Question 6

Number of protons, neutrons and electrons in ⁴¹K+

Answer 6

19, 22, 18

Question 7

Number of protons, neutrons and electrons in ¹⁶O

Answer 7

8, 8, 8

Question 8

Definition of Relative isotopic mass

Answer 8

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

Question 9

Definition of Relative atomic mass

Answer 9

Is the weighted mean mass of an atom of an element relative to 1/12 th of the mass of an atom of carbon-12

Question 10

Formulae for an ion of Mg

Answer 10

Mg2+

Question 11

Formulae for an ion of Oxygen

Answer 11

O2- (Oxide ion)

Question 12

Formulae for an ion of Iodine

Answer 12

I- (Iodide ion)

Question 13

Formulae for an ion of Rubidium

Answer 13

Rb+

Question 14

Formulae for an ion of Nitrogen

Answer 14

N3- (Nitride ion)

Question 15

Formulae for an ion of nitrate

Answer 15

NO↓3-

Question 16

Formulae for an ion of Carbonate

Answer 16

CO↓4²-

Question 17

Formulae for an ion of Sulfate (VI)

Answer 17

SO↓4²-

Question 18

Formulae for an ion of Hydroxide

Answer 18

OH-

Question 19

Formulae for an ion of Ammonium

Answer 19

NH↓4+

Question 20

Formulae for an ion of Zinc

Answer 20

Zn²+

Question 21

Formulae for an ion of Silver

Answer 21

Ag+