Chemistry Review

Matter & Physical/Chemical Changes

100

What is Matter

Anything that has mass and takes up space

200

What are the 4 states of matter?

Solid, Liquid, Gas, and Plasma

300

List 2 Chemical and 2 Physical PROPERTIES. 

Physical: Mass, volume, color, density, melting point, freezing point, malleability, ductility, conductivity

Chemical: Flammability, chemical stability, radioactivity, oxidation 

400

What are 3 INDICATIONS that a physical change may have taken place?

 change in size, change in shape, change in physical state/state of matter

500

What are 3 INDICATIONS that a physical reaction may have taken place?

Change in color, change in smell, change in temp, formation of gas, emission of light, formation of a solid. 

Atoms & Elements

100

What is the charge of a proton?

Positive

200

Where are neutrons located?

In the nucleus 

300

The atomic number is = to what?

How many protons are in the atom.

400

List 3 characteristics of metals. 

• Solids at room temperature

• Shiny

• Malleable (can be stretched or shaped)

• Ductile (can be drawn into a wire)

• Good conductors of heat and electricity

500

What is special about noble gases?

They have a full outer shell/ octet so they are very unreactive

Ions & Isotopes

100

What is a positively charged ion called?

Cation

200

How many electrons does the following element have.

Protons: 12

Neutrons: 6

Mass: 18

Atomic Number 12

Charge: -2

14 electrons 

300

What is the charge of the following element?

Protons: 12

Neutrons: 10

Electrons: 10

Mass: 22

Atomic Number 12

+ 2

400

What is an isotope?

Atoms of the same element with different numbers of neutrons

500

What is the average atomic mass for the following element?

Mass A = 25  Abundance A = 17%

Mass B = 28  Abundance B = 30%

Mass C = 29  Abundance C = 53%

28.02 

Bonding

100

What happens to electrons in a covalent bond?

They are shared 

200

What type of elements form an ionic bond

metal and a nonmetal

300

Why do elements form bonds?

To become more stable / complete their octet 

400

Balance the ionic bond between Mg and N

Mg₃N₂

500

Balance the ionic bond between Rb and Se

Rb₂Se

Random

100

Give an EXAMPLE of a chemical change 

Answers may vary

200

Which state of matter has the most energy?

Plasma

300

Give 2 characteristics of nonmetals. 

• Dull 

• Brittle

• Bad conductors of heat and electricity

• Good insulators 

400

What are valence electrons?

Electrons that are on the outermost energy level

500

What is a particle formed by a covalent bond called?

Molecule