Preview 6.5 A Elements and Compounds

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

• substance that cannot be broken down into simpler substance.
• A naturally occurring mineral made of more than 1 substance
• A small particle made with a specific chemical composition.
• atoms that have different abilities when joined together.

Provided is a list of five different substances. How many of these substances are elements?

• 2
• 3
• 4
• 5

Which element is one of the most abundant in both solid parts of Earth and in living matter?

• carbon
• nitrogen
• oxygen
• phosphorus

Which element makes up most of the Earth's atmosphere?

• hydrogen
• carbon
• nitrogen
• oxygen

How many of these substances are an example of an element?

• 1
• 2
• 3

How are elements and compounds different?

• A compound is two or more types of matter, an element is one
• Compounds are represented by one letter, elements by two.
• Infinite num. of elements,but a limited num. of compounds.
• Elements are always larger, and compounds are smaller

How many elements are in the compound Fe₂O₃?

• 0
• 1
• 2
• 3

While elements and compounds are related, they are different. Unlike elements, compounds

• consists of only one type of atom
• are the smallest form of a particle
• exist only as pure substances
• are made of at least two types of matter

This picture represents part of the Periodic Table. “Na” is called the elements

• formula
• Name
• symbol
• compound

Which of the following is a compound?

• water
• oxygen
• chlorine
• aluminum