Y9 - REVISION 3

An atom is made up of:

Which of the following is not an example of a chemical reaction

• burning of wood
• freezing of water
• rotting of fruit
• explosion of dynamite

What two products are usually produced from a combustion reaction?

What is not an indication of a chemical change?

• smell produced
• heat produced
• solid produced
• melting

Name the elements in
NaHCO₃

The atomic number of an element tells you

Methane burning in oxygen is an example of which type of reaction?

Acids have a high pH

• True
• False

what is an ion

• An ion is an atom or molecule that has a net electrical charge.
• An ion is a type of plant commonly found in tropical regions
• An ion is a type of gas found in the atmosphere
• An ion is a type of rock formed from volcanic activity

how do you calculate a neutron using the periodic table

• Neutron = mass number + Atomic number

• Neutron = mass number x Atomic number

• Neutron = mass number / Atomic number

• Neutron = mass number - Atomic number