Chapter 15 Vocab Cards Flashcards
a type of matter with a fixed composition
substance
atoms in a substance that all have the same identity. examples of this are copper and graphite
element
a substance in which atoms of two or more elements are combines in a fixed proportion
compound
A mixture in which different materials can be distinguished easily
heterogeneous mixture
contains 2 or more gaseous, liquid, or solid substances blended evenly throughout.
An example of this is soft drinks in sealed bottles.
homogeneous mixture
a homogeneous mixture of particles so small that they cannot be seen with a microscope and will never settle to the bottom of their container.
solution
A type of mixture with particles that are larger than those in solutions but not heavy enough to settle out.
colloid
the effect of light scattering in colloidal dispersion, while showing no light in a true solution.
Tyndall effect
a heterogeneous mixture containing a liquid in which visible particles settle. An example of this is pond water.
suspension
Any characteristics of a material that you can observe without changing the identity of the substances that make up the material is a…
physical property
A change in size, shape, or state of matter
physical change
The process of separating substances in a mixture by evaporating a liquid and recondensing its vapor
distillation
a characteristic of a substance that indicates whether it can undergo a certain chemical change
chemical property
A change of one substance to another
chemical change
states that the mass of all substances present before a chemical change equal the mass of all substances remaining after the change
law of conservation of mass
