Chemistry Chapter 1.2

What is chemistry?

The study of matter, its chemical and physical properties, and the chemical and physical changes it undergoes. As matter undergoes changes it gains and loses energy.

What is matter

Anything that has mass and occupies space

Energy

The ability to do work and accomplish some change

The three states of matter

Solid-particles are very close together definite shape and volume

Liquid-particles are slightly close together definite volume but no definite shape

Gas- particles are widely separated no definite shape or volume

What is physical property

is observed without changing the composition or identity of a substance EX: color, melting/boiling point, temperature, etc.

What is physical change?

produces a recognizable difference in the appearance of a substance without causing change in its composition or identity

What is chemical property

Chemical property is the observation of changes in composition only after a chemical reaction. EX: fire

What is chemical reactions(or chemical change)

The conversion into one more more different substances by rearranging, removing, or adding atoms. EX: keep in mind that you can’t go back on chemical reactions. Like if you were to bake cookies you can’t bring back the raw egg, flour, etc

What are intensive properties

a property of matter independent of the quantity of the substance. EX: color, melting point, boiling point, density. Think about the comparison between an ice cube and a glacier, a human adult and a baby.

What are extensive properties

a property of mater that depends on the quantity of the substance. EX: mass or volume

What is a pure substance

a substance that only has one component

What is a mixture

a combination of two or more substances

What is an element

What is a compound