Chemistry Review

Mass of a single atom of a chemical element. Express in AMU(Atomic Mass Units)

• Atomic Mass

• Valence Electrons

• Atomic Number

• Energy Levels

Columns in the Periodic Table

• Energy Levels

• Periods

• Groups

• Metals

Rows in the Periodic Table.

• Valence Shells

• Periods

• Energy Levels

• Group

Outside part of an atom around the nucleus of an atom

• Valence Electrons

• Valence Shells

• Electrons

• Shells/Energy Levels

Outermost shell of every element

• Valence Shells

• Shells/Energy Levels

• Valence Electrons

• Periods

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Absorbs heat (thermal energy), reaction is colder than its surroundings.

• Endothermic Reaction

• Allergic Reactioin

• Exothermic Reaction

• Energy Reaction

Tags

NGSS.MS-PS3-4

NGSS.MS-PS1-4

Energy in a system can change, but the total amount of energy cannot change

• Conservation of Heat

• Conservation of Elements

• Conservation of Energy

• Conservation of Atoms

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

The vertical (up and down) columns in the Periodic Table are called

• groups

• towers

• periods

• atomic numbers

Sodium (Na) is found in period 

• 3

• 2

• 4

• 1

Tags

NGSS.MS-PS1-1

What does the atomic mass tell you? 

• Basically,the number of electrons and protons

• The number of neutrons

• Basically, the number of protons and neutrons

• The number of protons.