Elements and Compounds 2

Carbon is considered an element while carbon dioxide is considered a compound. This is because carbon dioxide is –

• a gas at room temperature.
• made of two different elements.
• given off by green plants.
• useful to human beings.

A section of the Periodic Table of Elements is provided. What is the chemical symbol for magnesium?

• 12
• Mg
• 24.31
• Magnesium

Compounds are different than elements because compounds are -

• combinations of two or more elements
• not able to be broken down into parts
• made from the same type of atoms
• a pure substance, elements are not

The smallest particle of any particular type of matter is known by which of the following terms?

• Compound
• Atom
• Chemical
• Element

Which of the following is the best description of an element?

• A substance that cannot be broken down into simpler substances
• A naturally occurring mineral made of more than one substances
• A naturally occurring mineral made of more than one substances
• A collection of atoms that have different abilities when joined together

How many of these substances are elements?

• 2
• 3
• 4
• 5

The chart lists some substances and their symbols. How many of these substances are an example of an
element?

• 1
• 2
• 3
• 4

How are elements and compounds different?

• A compound is a combination of two or more types of matter, an element is one type.
• Compounds are represented by chemical symbols of one letter, elements by two.
• There are an infinite number of elements, but a limited number of compounds.
• Elements are always larger units of matter, and compounds are smaller.

How many elements are in the compound Fe₂O₃?

• 0
• 1
• 2
• 3

Which of the following is a compound?

• Water
• Oxygen
• Chlorine
• Aluminum