Atoms, elements, compounds and mixtures

What can be said about all the atoms in an element?

• they are made of same types of atoms

• they are made of different types of atoms

• they are all impure

• they are the biggest particles

Which of the following statements is false?

• Metals have high melting points.

• Metals conduct electricity.

• Non-metals have a dull surface.

• All non-metals are gases.

Which of the elements below are non-metals?

• silver

• zinc

• mercury

• carbon

Choose the correct matching of an element's name and its symbol.

• calcium-Ca

• sulfur-Sr

• sodium-So

• chlorine-Ch

What is the name of the compound formed when an iron and chlorine are combined together?

• chlorine ironide

• iron chlorate

• iron chloride

• iron chlorine

1 What is the name of the compound formed when aluminum, sulfur and oxygen are combined together?

• sulfur aluminate

• aluminum sulfide

• aluminum oxide

• aluminum sulfate

Which elements are found in calcium chlorate?

• calcium, chlorine and oxygen

• calcium and chlorine

• calcium only

• calcium and oxygen

How many of each element are found in carbon dioxide?

• 2 carbons and 1 oxygen

• 1 carbon and 1 oxygen

• 1 carbon and 2 oxygens

• 2 carbons and 2 oxygens

The formula for sulfuric acid is H₂SO₄ .

Name the three elements that sulfuric acid contains

• hydrogen, sodium and oxygen

• hydrogen, sulfur and oxygen

• helium, sodium and oxygen

• hydrogen and sulfur only

What name is given to a solution in which no more solute can be dissolved?

• dilute solution

• intensive solution

• saturated solution

• crazy solution