2. Atoms, ions and compounds

Question 1

What is the mass of protons?

Answer 1

1

Question 2

What is the charge of protons?

Answer 2

1+

Question 3

What is the mass of electrons?

Answer 3

1/1836

Question 4

What is the charge of electrons?

Answer 4

1-

Question 5

What is the mass of neutrons?

Answer 5

1

Question 6

What is the charge of neutrons?

Answer 6

0

Question 7

What are isotopes?

Answer 7

Atoms of the same element with the same number of protons but different number of neutrons.

Question 8

What is relative isotopic mass?

Answer 8

The mass of an isotope compared with 1/12 of the mass of an atom of carbon-12.

Question 9

What is relative atomic mass?

Answer 9

The weighted mean mass of an atom of an element compared with 1/12 of the mass of an atom of carbon-12.

Question 10

What is the charge of ammonia (NH3) ?

Answer 10

0

Question 11

What is the charge of ammonium (NH4) ?

Answer 11

1+

Question 12

What is the charge of hydroxide (OH) ?

Answer 12

1-

Question 13

What is the charge of nitrate (NO3) ?

Answer 13

1-

Question 14

What is the charge of carbonate (CO3) ?

Answer 14

2-

Question 15

What is the charge of sulfate (SO4) ?

Answer 15

2-

Question 16

What is the charge of hydrogencarbonate (HCO) ?

Answer 16

1-

Question 17

What is the charge of phosphate (PO4) ?

Answer 17

3-

Question 18

What is the charge of silver (Ag) ?

Answer 18

1+

Question 19

What is the charge of zinc (Zn) ?

Answer 19

2+

Question 20

What is the formula of sulfur?

Answer 20

S8

Question 21

What is the formula of phosphate?

Answer 21

P4