Fizzes and bangs, its elementary, Flashcards
What is the structure of an atom
The atom is made out of neutrons,electrons and protons.the neutrons and protons are in the middle and form the nucleus and then electrons orbit the nucleus
Properties of metals
Lustrous Hard A good electricity conductor A good heat conductor Malleable
Identify three common compounds and there
Water
Carbon dioxide
Rust
Why are internationally recognised symbols used for common element?
To allow everyone to recognise what your talking about
Why is the periodic table so important
The periodic table is so important because it allows elements to be categorised and identified.
Describe the differences between minerals compounds and molecules
A mineral is only made up one type of atom
A compound is made out of multiple atoms
A group of atoms bonded together
Why are models important
Models are important as they give a physical representation of thing or process like a model of the digestive system.
What is a physical change
A physical change is when something changes but doesn’t change its chemical make up and can also be changed easily.
What is a chemical change
A chemical change is when something changes but it changes its chemical structure, changing into something new entirely .This process is very hard to reverse .
Give three everyday example of a physical change
Freezing water
Melting ice
Evaporating water
Give an example of three everyday chemical changes
Making toast
Boiling an egg
How to determine that a change is a chemical change
To see if it has any characteristics of a chemical change
What are the characteristics of a chemical change
Colour change
Gas emmited
Temperature change
How to identify a physical change
The change can be revesed
Give a simple word equation to summarise a chemical change
Reactants –> products
Give an example of a combustion reaction
Explosion
Lighting a candle
Give an example of a decomposition reaction
Electrolysis of water into oxygen and hydrogen
What is rusting
Rusting is a chemical reaction when salt and water react to metal , it changes its colour to an orange colour an slowly destroys the metal.
Ways of minimising the effects of rusting
A process called galvanising is used to minimise the effects of rusting
What is galvenising
Galvanising is when a protective layer of zinc is applied to metal like steel or iron.
