PS M18 L1 Stability in Bonding Notes Review

Front

What is a compound?

Back

A compound is a substance formed from two or more elements in which the exact combination and proportion of elements is always the same.

Front

What can elements combine chemically to form?

Back

Elements can combine chemically to form compounds.

Front

How many electrons do most elements need in their outer energy levels to be stable?

Back

Most elements need 8 electrons in their outer energy levels to be stable.

Front

In a water molecule, how many hydrogen atoms does oxygen share with?

Back

Oxygen shares with two hydrogen atoms.

Front

What does a chemical formula show?

Back

A chemical formula shows what elements a compound contains and the exact number of atoms of each element in a unit of that compound.

Front

What is the octet rule?

Back

The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full outer shell of 8 electrons.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more different elements chemically bonded together.

Front

What is a chemical bond?

Back

A chemical bond is the force that holds atoms together in a compound.

Front

What are the two main types of chemical bonds?

Back

The two main types of chemical bonds are ionic bonds and covalent bonds.