Chemistry Formative

Question 1

Define atoms

Answer 1

Very small particles that make up all matter in all substances

Question 2

Define elements

Answer 2

2 or more atoms of the same type bonded together

Question 3

Key properties to describe elements

Answer 3

Dense
Brittle
Malleable
Conductor
Lustrous or shiny
Ductile

Question 4

Define dense

Answer 4

A material that contains a lot of particles in a small space

Question 5

Define brittle

Answer 5

A material that is delicate and easily broken

Question 6

Define malleable

Answer 6

A material that can be bent or shaped

Question 7

Define conductor

Answer 7

A substance that allows heat or energy to flow through it

Question 8

Define lustrous or shiny

Answer 8

Able to reflect light

Question 9

Define ductile

Answer 9

A material that can be easily bent without breaking and drawn into wires

Question 10

Single-atom

Answer 10

An example is helium which exists as a single atom

Question 11

Molecules

Answer 11

2 or more atoms bonded together

Question 12

Lattice

Answer 12

Atoms bonded together in a framework

Question 13

Properties of metals

Answer 13

Shiny
Solid at room temperature (except mercury)
Good conductors of heat and electricity
Malleable
Ductile

Question 14

Properties of non-metals

Answer 14

Dull
Poor conductors
Brittle

Question 15

compound

Answer 15

2 or more different atoms bonded together

Question 16

Pure substance

Answer 16

only made up of one chemical (e.g. water)

Question 17

Mixture

Answer 17

Made up of 2 or more chemicals (e.g. air)

Question 18

Physical change

Answer 18

• No new substances formed
• • Easy to reverse
    Bonds do not change
    e.g. inc melting

Question 19

Chemical change

Answer 19

• New substances formed
• Hard to reverse
• Bonds break and form
  e.g. frying an egg