1 - Atomic Structure

Question 1

What is the chemical symbol for sodium oxide?

Answer 1

Na2O

Question 2

The smallest piece of an element that can exist?

Answer 2

An Atom

Question 3

A combination of atoms from at least 2 different elements?

Answer 3

Compound

Question 4

Fe is the symbol for?

Answer 4

Iron

Question 5

The key features of a chemical reaction are?

Answer 5

• Compounds are broken up or formed
• At least 1 new substance is created
• Measurable energy change

Question 6

The word equation for sodium oxide is?

Answer 6

Sodium + Oxygen > Sodium Oxide

Question 7

How is a symbol equation balanced?

Answer 7

The equation must have the same number of atoms on either side

Question 8

What are the 2 types of equations?

Answer 8

• Word equations

- Symbol equations

Question 9

A substance that is made up of 2 or more elements of compounds that haven’t been chemically combined together?

Answer 9

Mixture

Question 10

What is crystallization?

Answer 10

The separating of solutions into their different parts I.e solute and liquids

Question 11

What is Filtration?

Answer 11

The separation of mixtures of insoluble solids and liquids done by pouring the mixture through filter paper

Question 12

Define insoluble?

Answer 12

Can’t dissolve

Question 13

What is Chromatography?

Answer 13

The separation of solutions with a number of different solutes in the solvent

Question 14

What is fractional distillation?

Answer 14

The separation of lots of liquids with different boiling points

Question 15

What is simple distillation?

Answer 15

The separation of 2 liquids with different boiling points

Question 16

How many main ways are there to separate mixtures?

Answer 16

5

Question 17

Name all 5 methods of separating mixtures

Answer 17

• Crystallization
• Filtration
• Chromatography
• Simple distillation
• Fractional distillation

Question 18

Fractional distillation separates what?

Answer 18

Mixtures

Question 19

What is air?

Answer 19

A mixture

Question 20

Why is a thermometer used in simple distillation?

Answer 20

To make sure the highest boiling point is not exceeded

Question 21

State 3 key points surrounding the proton?

Answer 21

• Protons have a relative charge of +1
• They are found in the nucleus
• An element’s atomic number is the number of protons it has

Question 22

State 3 key points about electrons?

Answer 22

• Electrons have a relative charge of -1
• They are found in fixed orbits around the nucleus
• In any atom the total number of negative electrons equals the number of positive protons, meaning atoms have no overall electric charge.

Question 23

State 2 key points of a neutron?

Answer 23

• Neutrons have a relative charge of 0 - they are neutral

- Like protons, they are found in the nucleus as well as DNA strands

Question 24

What are atoms made up of?

Answer 24

• Atoms are made up of a nucleus and orbiting electrons

Question 25

Name the sub - atomic particles?

Answer 25

- Neutron (0) - Proton (+1) - Electron (-1)

Question 26

Where is the mass number?

Answer 26

Top

Question 27

Where is the atomic number?

Answer 27

Bottom

Question 28

Magnesium has an atomic number of 12, how many protons and electrons does a neutral Mg atom have?

Answer 28

12 protons + 12 electrons

Question 29

What is the relative mass of an electron?

Answer 29

0.0005

Question 30

What is the relative mass of protons and neutrons?

Answer 30

1

Question 31

Is the nucleus positive, negative or neutral?

Answer 31

Positive

Question 32

What is the overall charge of an atom?

Answer 32

Positive

Question 33

What are the 3 isotopes of hydrogen?

Answer 33

Protium Deuterium Tritium (most common)

Question 34

How many electrons do group 1 metals lose?

Answer 34

1 to form positive ions with a charge of +1

Question 35

Isotopes are atoms of the same element that have the same number of protons but a different number of ...

Answer 35

neutrons