Chemistry unit 1

A substance made up of atoms of two or more different elements joined by chemical bonds

• Compound

• Heterogeneous Mixture

• Homogeneous Mixture

• Solution

Pure substance that consists entirely of one type of atom.

• Solution

• Mixture

• Compound

• Element

Elements have the most similar properties if they are in the same _______?

• Periods

• Groups

• Rows

• Blocks

What type of elements does the image show?

• Metals

• Nonmetals

• Gases

• Metalloids

Which physical property would most likely be a nonmetal

• Good conductor

• Ductile

• Brittle

• Shiny

When an atom loses an electron, it becomes a

• positive ion

• negative ion

• neutral ion

• neutral atom

An electron has what kind of charge?

• no charge
• positive 
• negative
• it depends

How does oxygen become an oxide ion?

• it loses 2 electrons

• it gains 2 electrons

• it shares electrons

• it releases energy

Valence electrons are found

• in the innermost energy level of an atom

• in the middle energy levels of an atom

• in the outermost energy levels of an atom

Cations

• Gain electrons, has an overall positive charge

• Lose electrons, has an overall positive charge

• Lose electrons, has an overall negative charge

• Gain electrons, has an overall negative charge