Chapter 8 Flashcards
Nucleus
The core of an atom
Model
A useful representation of something that aids in studying the subject further
Proton
A particle in the nucleus of an atom that has a positive charge
Neutron
A particle in the nucleus of an atom that has no charge
Electron
A particle outside the nucleus of an atom that has a negative charge
Element
A substance that is made of only one particular type and cannot be broken into simpler substances
Chemical symbol
One or two letters that represent an element’s name
Periodic Table
A chart that arranges all the known elements by their properties
Molecule
Two or more atoms together
Compound
A molecule that consists of two or more different elements
Chemical Formula
A group of chemical symbols and numbers that describes the types and numbers of elements present in a molecule
Density
The measure of how compact matter is
Chemical Reaction
The rearrangement of atoms within molecules to make new molecules with different properties
Reactant
A substance present at the start of chemical reaction
Product
A substance produced by a chemical reaction
