AQA C1 Chemistry Quiz

What is the smallest part of an element that can exist?

• Molecule

• Atom

• Compound

How are atoms of each element represented?

• By their atomic number

• By their mass number

• By a chemical symbol

• By their color

Approximately how many different elements are there?

• 50

• 100

• 150

• 200

How are compounds formed?

• By mixing elements physically

• By chemical reactions

• By heating elements

• By dissolving elements in water

What do chemical reactions always involve?

• The formation of one or more new substances

• The destruction of atoms

• The creation of energy

• The change of color

How can chemical reactions be represented?

• By pictures

• By word equations or equations using symbols and formulae

• By physical models

• By color changes

What should students be able to do with the periodic table for the exam?

• Memorize the entire table

• Use the names and symbols of the first 20 elements

• Draw the periodic table

• Identify the colors of elements

What is a mixture?

• A combination of two or more elements or compounds that are chemically combined.

• A combination of two or more elements or compounds that are not chemically combined.

• A single element or compound.

• A combination of two or more elements or compounds that cannot be separated.

Which of the following is NOT a physical process used to separate mixtures?

• Filtration

• Crystallisation

• Combustion

• Chromatography

What did the discovery of the electron lead to in terms of atomic models?

• The nuclear model

• The plum pudding model

• The planetary model

• The quantum model