Chapter 2, Quiz 1 Flashcards
Anything that has mass and occupies space
Matter
The law that states that the masses of chemical substances combine in definite, characteristic integer ratios when forming compounds
Law of Definite Proportions
A model that states that all physical matter exists in the form of particles in constant motion
Particle Model of Matter
The building block of all matter; consists of protons, electrons, and (usually) neutrons
Atom
A particle consisting of two or more atoms covalently bonded together
Molecule
The measure of the amount of matter in an object
Mass
The space enclosed or occupied by an object
Volume
The mass per unit volume of an object
Density
The force of gravity acting on the matter in an object
Weight
A material made of only one kind of element or compound
Pure Substance
A pure substance that consists of atoms with the same atomic number
Element
A pure substance consisting of atoms of two or more elements that are chemically combined in a fixed ratio
Compound
A physical combination of two or more substances in a changeable ratio
Mixture
A mixture that does not have a uniform appearance since the combined substances are unevenly distributed
Heterogeneous Mixture
A mixture that has a uniform appearance throughout; also known as a solution, especially of a solid dissolved in a liquid
Homogeneous Mixture
