8th Grade The Periodic Table

A "pure" substance that cannot be separated or broken down into simpler substances

• Compound
• Mixture
• Period
• Element

Most of these elements are gases and are located on the right side of the periodic table

• Metalloids
• Compounds
• Nonmetals
• Metals

A substance composed of two or more elements chemically bonded together.  Examples are H₂O and CO₂.

• Element
• Compound
• Electron Cloud
• Metalloid

Tags

NGSS.MS-PS1-1

This number is  the top number in the box on the periodic table and ALWAYS equals the number of protons

• Neutrons
• Atomic Mass Number
• Group
• Atomic Number

Each column in the periodic table is called a 

• period
• group
• cluster
• unit

The atomic number tells you what?

• number of electrons
• number of protons
• number of neutrons
• both electrons and protons in an atom.

Which group of the periodic table is composed of inert (not reactive)  gases?

• alkali metals
• alkaline earth metals
• halogens
• noble gases

A proton is....

• A negatively charged subatomic particle
• A positively charged subatomic particle
• A neutrally charged subatomic particle
• The only subatomic particle located in the nucleus

A neutron has a charge of

• +2
• No charge
• -1
• +1

An element's identity is determined by the number of

• electrons.
• protons.
• neutrons.
• valence.