8.1 MATTER

What is an atom?

• Mixture of two or more atoms chemically

• The smallest particle in an element

• Positively-charged particles

• Negatively-charged particles

X: positively or negatively charged. X is

• Atom

• Molecule

• Ion

• Element

Ammonia is a type of

• Molecule

• Ion

• Element

• Atom

Which of the following is a molecule?

• Helium

• Sodium chloride

• Oxygen

• Iron

Which of the following substances does not consist of atoms?

• Aluminium

• Zinc

• Copper

• Chlorine

False statement about copper sulphate is

• Consist of positive and negative ions

• Low melting point

• Solid at room temperature

• Has a strong ionic bond

Which of the following is an ionic compound?

• Sodium chloride

• Water

• Methanol

• Carbon dioxide

The diagram shows particles. Which could be the particles?

• Sodium chloride

• Water

• Oxygen gas

• Aluminium

Which of the following substances have particles that are arranged in neat and orderly manner?

• Cooking oil

• Sugar solution

• Air in balloon

• Common salt

________ consists of two or more atoms which are chemically combined

• Atom

• Molecule

• Ion