Unit 3

Question 1

What is an elmement

Answer 1

Contains only one type of atom eg iron and hydrogen

Question 2

What is a compound

Answer 2

Two or more elements chemically bonded together

Question 3

What is a mixture

Answer 3

Two or more elements not chemically bonded together

Question 4

What is a soluble

Answer 4

A substance that can be dissolved in a solvent

Question 5

What is an insoluble

Answer 5

A substance that can’t be dissolved in a solvent

Question 6

What is solute

Answer 6

The substance being dissolved

Question 7

Name the hazard symbols

Answer 7

Explosive, flammable, oxidising, gas under pressure, corrosive, acute toxic, irritant, reproductive toxin, hazardous to the environment

Question 8

What are Hazard symbols

Answer 8

Hazard symbols are found on chemicals to let us know the risks
Pictures so understood universally

Question 9

What are elements

Answer 9

Elements are the building blocks for all other substances

Question 10

What are metallic elements like

Answer 10

Good conductors of heat and electricity
Solid at room temp except for Mercury 
High density
High melting and boiling points
Malleable 
Lustrous

Question 11

What are non-metallic elements like

Answer 11

Poor conductors except for granite
Can be gas liquid or solid at room temp
Low density
Soft and brittle except for diamond
Usually dull except for diamond