Matter

Water, table salt, sugar and rust are examples of

• Compounds

• Elements

• Mixtures

• Solutions

Which of the following pure substances is correctly matched to its chemical symbol?

• Carbon monoxide CO2

• Iron, I

• Silicon, S

• Water, H2O

Table salt is a compound with the chemical name sodium chloride. Which is its chemical symbol?

• CaCO3

• NaCl

• NaBr

• Mg(OH)2

A homogeneous liquid that cannot be separated into its components through physical means but can be decomposed through electrolysis is classified as ______.

• Compound

• Element

• Mixture

• Solution

Measuring the mass and volume of a piece of chalk is a way of investigating its __________.

• Physical and intensive properties

• Physical and extensive properties

• Chemical and extensive properties

• Chemical and intensive properties

Which statement best describe the illustration?

• It is an element

• It is a compound

• It is a mixture

• It is a liquid particles

A scientist found that a sample of matter contains three types of atoms. The sample can be any of the following except a/an__________.

• Compound

• Element

• Mixture

• Molecule

Oxygen dissolved in water is a/an ________.

• Element

• Compound

• Heterogeneous mixture

• Homogeneous mixture

Which of the following statements describes a chemical property?

• An iron bar rusts

• Ice melts when heated

• The density of iron is 7.87 g/cm3

• Aluminum is a silver-colored metal

When water boils, bubbles rise to the surface of the water. What are these bubbles made of?

• Air

• Hydrogen and oxygen

• Oxygen

• Water vapor