M2 Atoms, Ions and Compounds

Question 1

What is the atomic number?

Answer 1

The number of protons in an element.

Question 2

Define an isotope

Answer 2

An element with the same number of protons, but a different number of neutrons and different masses

Question 3

What is the mass number?

Answer 3

Number of protons + neutrons (Mr)

Question 4

What is an ion?

Answer 4

A charged particle

Question 5

Define relative isotopic mass

Answer 5

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

Question 6

Define relative atomic mass

Answer 6

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

Question 7

Define a binary compound

Answer 7

A compound that contains two elements only

Question 8

Nitrate ion formula

Answer 8

NO3 -

Question 9

Carbonate ion formula

Answer 9

CO3 2-

Question 10

Sulfate ion formula

Answer 10

SO4 2-

Question 11

Hydroxide ions formula

Answer 11

OH-

Question 12

Ammonium ion formula

Answer 12

NH4 +

Question 13

Zinc ion formula

Answer 13

Zn 2+

Question 14

Silver ion formula

Answer 14

Ag +

Question 15

Common salts of sodium, potassium and ammonium: soluble or insoluble?

Answer 15

Soluble

Question 16

Nitrates: soluble or insoluble?

Answer 16

Soluble

Question 17

Common chlorides: soluble or insoluble?

Answer 17

Soluble (except silver and lead chloride)

Question 18

Common sulfates: soluble or insoluble?

Answer 18

Soluble (except lead, barium and calcium sulfate)

Question 19

Common carbonates and hydroxides: soluble or insoluble?

Answer 19

Insoluble (except sodium, potassium and ammonium)