Unit 2 Vocab Flashcards
Matter
Any substance with mass and that takes up space
Physical Property
A characteristic of a substance that can be observed or measured without changing its identity
Chemical Property
A characteristic of a substance that is observed through a chemical reaction
density
mass/volume
Physical Change
A change in a substance that does NOT change its identity
Chemical Change
A change in a substance that changes its identity
Chemical Symbol
A notation of 1 or 2 letters that represent an element
Law of conservation of mass
Matter cannot be created nor destroyed, but can change forms
Reactants
A substance that undergoes change during a reaction
Products
A substance formed as a result of a chemical reaction
Chemical Reaction
A process that leads to the chemical transformation of one set of chemical substances to another.
Chemical Formula
A form of representation for a compound or molecule
Precipitate
an insoluble solid that emerges from a liquid solution
Endothermic
A reaction where the reactants absorb energy from its surroundings
Exothermic
A reaction where energy is released in the form of heat or light
Substance
Matter which has specific composition and scientific properties
Element
A chemical substance that cannot be broken down into other substances
Compound
Any substance composed of identical molecules consisting of atoms of two or more chemical elements
Mixture
A material composed of two or more simpler substances
Heterogenous
A substance that is not uniform throughout
Homogenous
A substance that is uniform throughout
Solution
A homogenous mixture of two or more substances
Alloy
A mixture composed of two or more elements, at least one of which is a metal
Solute
A substance that dissolves in water
