2.1 Elements and the Periodic Table

What is an element?

• A substance that can be split into other substances

• A substance that cannot be split into other substances

• A type of compound

• A type of mixture

What is the most common element in the Universe?

• Nitrogen

• Carbon

• Hydrogen

• Helium

What is the second most common element in the Universe?

• Nitrogen

• Carbon

• Helium

• Hydrogen

What is the most common element in the Earth's atmosphere?

• Hydrogen

• Helium

• Carbon

• Nitrogen

What is the periodic table ?

• A table that lists all the elements grouped together.

• A table that lists all the compounds grouped together.

• A table that lists all the mixtures grouped together.

• A table that lists all the multiplication numbers grouped together.

What are the elements on the left of the stepped line in the periodic table called?

• Metals

• Non-metals

• Compounds

• Mixtures

What are the elements on the right of the stepped line in the periodic table called?

• Mixtures

• Metals

• Non-metals

• Compounds

What is the use of platinum in catalytic converters in cars?

• Storing computer data.

• Converting harmful exhaust gases to less harmful ones.

• Making the car attractive and fast.

• Reduce fuel consumption.

What is the use of platinum in computer hard drives?

• Converting harmful exhaust gases to less harmful ones.

• Making your computer attractive and shiny.

• Making your computer environment friendly.

• Storing computer data.

What is the use of platinum in open heart surgery?

• Making your heart bigger.

• Converting harmful exhaust blood to less harmful ones.

• Keeping the heart narrowed blood vessels open.

• Improve the heart memory.