Classification of Matter What is matter and how do we as scientists categorize it?
Matter Pure Substances Mixtures Element Compound Homogeneous (Solutions) Heterogeneous Matter Can Be Classified
Matter • Anything that has mass and takes up space • Anything made from atoms • Examples: • Molecules • Cells • People • Air • Water
Pure Substances versus Mixtures Matter is classified as either a pure substance or a mixture Pure Substances Mixtures Every piece of matter is the same More than one type of matter mixed together
Elements versus Compounds Pure substances are either elements or compounds Elements Compound Every atom is the same type of atom More than one type of atom chemically bonded together. Every molecule is the same.
Elements Single Atom Cannot be separated by chemical or physical processes Element Pure substance Every atom is the same Elements can be found on the periodic table!
Compounds Single Molecule Made of more than one type of atom bonded together Compound Pure substance Every molecule is the same Can be separated by chemical reactions only
Mixtures Mixtures can be classified as homogeneous or heterogeneous Homogeneous (aka “solution”) Heterogeneous It looks the same throughout Different matter can be seen (chunks, bubbles, floaties, layers, etc.)
Mixtures Element Compound >1 different type of matter Can be separated chemically or physically Mixture Not a pure substance
Mixture Possibilities • Mixtures can be any combination of solids, liquids and gases: • Solid-solid: Medicine tablet • Solid-gas: Popping candy • Solid-liquid: Ice water • Liquid-liquid: Lemon water • Gas-Liquid: Carbonated water • Gas-Gas: Air
Let’s Practice Example: Determine if each is element, compound, homogeneous or heterogeneous mixtures Tin foil Copper pipe Concrete Carbon tetrachloride Sports drink
Let’s Practice Example: Determine if each is element, compound, homogeneous or heterogeneous mixtures Tin foil Element Copper pipe Element Concrete Heterogeneous mix Carbon tetrachloride Compound Sports drink Homogenous mix