Elements, Compounds, and Mixtures Question Companion

How are elements and compounds different?

• Elements are many different types of atoms together but compounds are just one type of atom.

• Elements are pure substances that cannot be broken down physically but compounds are pure substances that can be broken down physically.

• Elements are not found on the Periodic Table but compounds are found on the Periodic Table.

• Elements are pure substances that cannot be broken down chemically but compounds are pure substances that can be broken down chemically.

Which element is found in all organic compounds?

• Mercury (Hg)

• Oxygen (O)

• Potassium (K)

• Carbon (C)

The atmosphere that covers our planet is considered a(n) –

• Element

• Compound

• Mixture

• Organic compound

Which of the following could be the chemical formula for a compound?

• Si

• H₂O

• Zn

• C + O₂

True or False: Compounds can only be broken down by chemical means.

• True

• False

A ________ mixture has a uniform composition and the same properties throughout.

• homogeneous

• heterogeneous

• colloidal

• suspension

Compounds have ________ properties than the elements that make them up.

• different

• similar

• identical

• weaker

What elements have to bond with Carbon to form an organic compound?

• Hydrogen

• Neon

• Phosphorus

• Helium

• Sulfur

The only way to break the bonds in a compound is with a _________

• chemical reaction

• physical change

• mixture

• dissolving

Examine the diagrams below and then label each one as either an element, compound, or mixture. You will draw the word under each picture.