Chapter One Flashcards
What is chemistry?
The study of substances; their, properties, structure, and the changes they undergo.
What is a pure substance?
A single type of matter.
How can substances be broken down?
Through exposure to heat or some method chemical treatment.
What are elements?
Substances that cannot be reduced to any simpler forms by ordinary physical or chemical means.
What is a compound?
A substance containing more the one element.
What is a molecule?
An assembly of atoms having a fixed composition, structure, and distinctive measurable properties.
What is a mixture?
A physical combination of two or more substances not chemically combined.
What dose microscopic imply?
The atomic or subatomic levels that cannot be seen directly, even under a microscope.
What dose macroscopic imply?
Things that we can see through direct observation of physical properties.
What dose the formula of a substance express?
The relative number of atoms of each element it contains.
What dose composition refer to?
the types and amounts of elements or compounds that make up a substance.
What are atoms?
The smallest units of matter.
What are properties?
The characteristics that help distinguish one substance from another.
What is a physical property?
A characteristic of matter that is not associated with a change in chemical composition.
What is a chemical property?
The change of one type of matter into another.
What is separation science?
The act of isolating components from a mixture.
What is distillation?
The separation of liquids having different boiling points.
What do Spectrophotometers do?
Examine the ways that light of various wavelengths is absorbed by atomic and molecular species.
