C1 - Atomic Structure

Question 1

What is an element?

Answer 1

A substance containing only one type of atom.

Question 2

What is a compound?

Answer 2

A substance containing more than one type of atom.

Question 3

What is the law of conservation of mass?

Answer 3

The total mass of the products formed in a reaction must be equal to the total mass of the reactants.

Question 4

What is the state symbol of a solid?

Answer 4

(s)

Question 5

What is the state symbol of a liquid?

Answer 5

(l)

Question 6

What is the state symbol of a gas?

Answer 6

(g)

Question 7

What is the state symbol of an aqueous solution?

Answer 7

(aq)

Question 8

What are the 4 ways to separate a mixture?

Answer 8

• Filtration
• Crystallisation
• Distillation
• Chromatography

Question 9

What does filtration do?

Answer 9

Filtration seperates substances that are insoluble in a particular solvent from those that are soluble in the solvent.

Question 10

What does crystallisation do?

Answer 10

Crystallisation seperates a soluble solid from a solvent.

Question 11

What does distillation do?

Answer 11

Distillation seperates the solvent from a soluble mixture.

Question 12

What does chromatography do?

Answer 12

Chromatography seperates mixtures of substances dissolved in a substance.

Question 13

Who created the Plum Pudding Model?

Answer 13

J. J. Thomson

Question 14

What is the plum pudding model?

Answer 14

The plum pudding model has electrons suspended in a sphere of positive charge.

Question 15

What is the atomic model?

Answer 15

The atomic model has protons and neutrons in a nucleus surrounded by electrons in electron shells.

Question 16

What was the gold foil experiment?

Answer 16

Geiger and Marsden shot alpha particles at a piece of gold foil. Some particles passed through while some did not.

Question 17

What is the relative charge of a proton?

Answer 17

+1

Question 18

What is the relative mass of a proton?

Answer 18

1

Question 19

What is the relative charge of a neutron

Answer 19

0

Question 20

What is the relative weight of a neutron?

Answer 20

1

Question 21

What is the relative charge of an electron?

Answer 21

-1

Question 22

What is the relative charge of an electron?

Answer 22

1/2,000 (negligible)

Question 23

What is the atomic number of an element?

Answer 23

The number of protons in an element.

Question 24

What is the mass number of an element?

Answer 24

The number of protons and neutrons in an element.

Question 25

What is an ion?

Answer 25

An atom that has either gained or lost electrons.