6.7 What are compounds?

What is a compound?

• A substance made up of atoms of the same element

• A substance made up of atoms of different elements

• A substance made up of molecules

• A substance made up of protons and neutrons

Which elements make up the white part of teeth enamel?

• Calcium, Phosphorus, Nitrogen

• Sodium, Chlorine, Oxygen

• Carbon, Hydrogen, Oxygen

• Calcium, Phosphorus, Oxygen

The properties of a compound are .................................. the properties of the elements in it.

• as same as

• different from

What are the properties of sodium ?

• Shiny metal and exists as molecules

• Solid at 20ºC and a colorless gas

• Green, smelly, and poisonous gas

• Shiny metal, and fizzes in water.

What are the properties of calcium?

• Shiny metal and exists as molecules

• Solid at 20ºC and a colorless gas

• Green, smelly, and poisonous gas

• Shiny metal, and fizzes in water.

What are the properties of chlorine?

• Shiny metal and exists as molecules.

• Solid at 20ºC and a colorless gas.

• Green, smelly, and poisonous gas.

• Shiny metal, and fizzes in water.

What are the properties of phosphorus?

• A poisonous solid that catches fire easily.

• Solid at 20ºC and a colorless gas.

• Green, smelly, and poisonous gas.

• Shiny metal, and fizzes in water.

What are the properties of oxygen?

• A poisonous solid that catches fire easily.

• Solid at 20ºC and a colorless gas.

• Green, smelly, and poisonous gas.

• A gas that helps things burn.

What are the properties of carbon monoxide?

• Exists as a solid which is shiny metal and fizzes in water

• Deadly poisonous gas and exists as molecules.

• Shiny metal and catches fire easily.

• Solid at 20ºC and a colorless gas.

What are the properties of carbon dioxide?

• Shiny metal and fizzes in water

• Shiny metal and catches fire easily

• Deadly poison and solid at 20ºC

• Not poisonous and exists as molecules