Understanding Pure Substances and Mixtures

Who was the first scientist to use the term 'element'?

• Isaac Newton

• Robert Boyle

• Albert Einstein

• Marie Curie

Which of the following is NOT a property of metals?

• They have a shiny luster.

• They are poor conductors of electricity.

• They can be drawn into wires.

• They are malleable.

Which metal remains liquid at room temperature?

• Gold

• Iron

• Mercury

• Copper

Which of the following is a property of non-metals?

• They are sonorous.

• They are good conductors of heat.

• They display a variety of colors.

• They are malleable.

Which non-metal is an exception to being non-lustrous?

• Carbon

• Iodine

• Oxygen

• Hydrogen

What is a characteristic of metalloids?

• They are excellent conductors of electricity.

• They have properties of both metals and non-metals.

• They are non-lustrous.

• They are highly malleable.

Which of the following is an example of a metalloid?

• Silicon

• Oxygen

• Gold

• Iron

What gas is produced in the first cup during the activity?

• Carbon Dioxide

• Oxygen

• Hydrogen

• Nitrogen

What is the main difference between the materials obtained in the two cups in the activity?

• One is a mixture and the other is a compound.

• Both are mixtures.

• Both are compounds.

• Both have magnetic properties.

What type of change occurs in the second cup during the activity?

• Physical change

• Chemical change

• Magnetic change

• No change