Classification of Matter What is matter and how do we as scientists categorize it?

Matter Can Be Classified Matter Pure Substances Mixtures ElementCompound Homogeneous (Solutions) Heterogeneous

Matter Anything that has mass and takes up space Anything made from atoms Examples:  Molecules  Cells  People  Air  Water

Pure Substances versus Mixtures MixturesPure Substances Every piece of matter is the same More than one type of matter mixed together Matter is classified as either a pure substance or a mixture

Elements versus Compounds CompoundElements Every atom is the same type of atom More than one type of atom chemically bonded together. Every molecule is the same. Pure substances are either elements or compounds

Elements Pure substance Every atom is the same Elements can be found on the periodic table! Element Single Atom Cannot be separated by chemical or physical processes

Compounds Pure substance Every molecule is the same Compound Single Molecule Made of more than one type of atom bonded together Can be separated by chemical reactions only

Mixtures Heterogeneous Homogeneous (aka “solution”) It looks the same throughout Different matter can be seen (chunks, bubbles, floaties, layers, etc.) Mixtures can be classified as homogeneous or heterogeneous

Mixtures Not a pure substance Mixture >1 different type of matter Can be separated chemically or physically Element Compound

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 Tin foil Example: Determine if each is element, compound, homogeneous or heterogeneous mixtures Copper pipe Concrete Carbon tetrachloride Sports drink

Let’s Practice ElementTin foil Example: Determine if each is element, compound, homogeneous or heterogeneous mixtures Element Copper pipe Heterogeneous mix Concrete Compound Carbon tetrachloride Homogenous mix Sports drink