Chemistry

Is anything that has mass and occupies space

Is a type of matter that cannont be broken down into two or more pure substances. There are 115 known elements and 91 occure naturally.

Is a pure substance that contains more than one element. Water is a compound of hydrogren and oxygen. Compounds have fixed compositions. means it contains the same elements in the same percentages by mass.

Contains two or more substances combined in such a way that each substances retains its chemical identity

Homogenous / Heterogenous mixtures

Also known as a uniform mixtures are ones in which the composition is the same throughout. Another name is Solution. which is made up of a solvent; usually a liquid, but can be liquids, gases or solids ex soda water is a mixture of carbon dioxide (solute) and water (solvent)

a non-uniform mixture are those in which the composition varies throughout. Most rocks fall under this category.

• Mega ( 10^6+ ) Kilo ( 10^3 ) [ GRAM ] Deci (10^-1) Centi ( 10^-2 ) Mili ( 10^-3 ) Micro ( 10^-6 ) Nano ( 10^-9) Pico ( 10^-12 )
• ------------------------------ [ LITER ]
• -------------------------------[ METER ]

Celsius = 1.8(degree celsius) + 32

Fahrenheit to celsius = (degree celsius) - 32 / 1.8

Celsius to kelvin = degree celsius + 273.15 = kelvin / degree of kelvin - 273.15 = Celsius

• speed = distance traveled /
• -------- time elasped

The smallest of the significant figures is the one you use.

• gold = Au
• silver = Ag
• magnesium = Mg
• Lead = Pb

• Cr = Chromium
• Ca = Calcium
• Fe = Iron
• Zn = Zinc