Chapter 1 Flashcards
(28 cards)
Ratio
Tells you the relationship between two or more things
Pure
material is not mixed with any other matter
Property
A characteristic that belongs to a person or a thing
Matter
Anything that has mass and takes up space
Chemistry
The study of the properties of matter and how matter changes
Substances
A single kind of matter that is pure and has a specific set of properties
Physical Properties
A characteristic of a pure substance that can be observed without changing it into another substance
Chemical Property
A characteristic of a substance that describes its ability to change into different substances
Element
A pure substance that can’t be broken down into other substances by chemical or physical means
Atom
The basic particle from which all elements are made
Chemical Bond
The force of attraction that holds two atoms together
Molecule
A neutral group of two or more atoms held together by covalent bonds
Compound
A substance made of two or more elements chemically combined in a specific ratio or proportion
Chemical formula
Symbols that show the elements in a compound and the ratio of atoms
Mixture
Two or more substances that are together in the same place but their atoms are not chemically bonded
Weight
A measure of the force of gravity
Mass
A measure of how much matter is in an object
International system of units
A system of units used by scientists to measure the properties of matter
Volume
The amount of space that matter occupies
Density
The measurement of how much mass of a substance is contained in a given time
Physical change
A change that alters the form or appearance of a material but does not make the material into another substance
Chemical change
A change in which one or more substances combine or break apart to form new substances
Law of conservation of mass
The principle that the total amount of matter is neither created nor destroyed during any chemical or physical change
Temperature
How hot or cold something is; a measure of the average energy of motion of the particles of a substance; the measure of the average kinetic energy of the particles of a substance
