CHEM UNIT 2 TEST - MATTER

test on MON 10/5

matter

anything that has mass and takes up space

• classified into pure substances and mixtures

particle

a singular atom or a grouping of chemically bonded atoms

pure substances

substances made of only one type of particle

• classified into elements and compounds

element

matter with only one type of atom

compound

matter with different kinds of atoms bonded together in definite ratios (matter with only one type of molecule)

mixture

matter with more than one kind of particle

• classified into homogeneous and heterogeneous mixtures

homogeneous mixtures

mixtures with uniform composition to the naked eye

heterogeneous mixtures

mixtures with nonuniform composition to the naked eye

physical properties

properties that can be observed and measured WITHOUT changing composition of a substance

• color, odor, density

chemical properties

a substance’s ability to change composition

• baking soda and vinegar, a candle burning

physical change

a change that alters a substance WITHOUT changing its chemical composition

• cutting, grinding, breaking, dissolving

chemical change

a change that alters a substance’s chemical composition

• gas forms (not upon heating), color changes, odor changes, temperature changes (not upon heating or cooling)

properties of matter

the specific characteristics or traits used to describe, identify, and distinguish between different types of matter

• classified into intensive and extensive properties

intensive properties

properties that do NOT depend on quantity of matter

• color, melting point, boiling point, odor, density

extensive properties

properties that depend of quantity of matter

• mass, volume, length

density formula

m/v

mass formula

d x v

volume formula

m/d