Pure substance formed when 2 or more different elements combine.

What is the center of an atom called?

Particles in an atom that are neutral and have no charge are

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

All matter is made of what?

Ions are:

What is an example of a physical change?

What is an example of a chemical change?

A covalent bond is formed as a result of

An example of a compound is:

The minimum amount of energy needed for reactants to form products in a chemical reaction is called:

A substance that lowers the activation energy needed to start a chemical reaction.

The total number of atoms in a molecule of glucose, C₆H₁₂O₆, is:

What is an atom?

Protons:

Neutrons:

Electrons:

1^st shell (energy level) holds how many electrons:

2^nd shell (energy level) holds how many electrons:

True or False - An energy level has to be full before moving on to the next energy level?

What is a pure substance that cannot be broken down into any other substance by physical or chemical means. Ex: Gold, Silver, Oxygen, & Nitrogen

Who developed the modern day periodic table of elements?

"B" and "C" in the image are found in the ______ of an atom.

An attraction that occurs when molecules come close together causing positive and negative regions to pull on molecules and hold them together. (Example: geckos use this to help them when “hanging” around on a surface.)

These proteins are biological catalysts that speed up the rate of chemical reactions.

In the equation, what are the products of the reaction?

CH₄ + 2O₂ → CO₂ + 2H₂O

What does a represent?

What does b represent?

What does c represent?