Chemistry Flashcards
In the center (nucleus) of an atom, weighs one atomic mass , has positive charge
Protons
Smallest unit of matter, built from 3 particles, protons, neutrons, electrons
Atoms
Orbits an atoms nucleus, has no measurable mass, negative charge, organized in energy levels, stays with the atom due to the positive charge of protons
Electrons
Located in the nucleus, mass- 1 atomic mass unit, no charge, neutral
Neutrons
Types of atoms
Elements
Number of protons in a nucleus, helps determine # of electrons
Atomic number
Energy levels of electrons can be diagrammed with this, can help predict how reactive a molecule
Bohr Model
Bonds are formed or broken between atoms, the products have new properties
Chemical reactions
The center of an atom
Nucleus
A substance that takes part in and undergoes change during a reaction
Reactant
A substance that is formed as a result of a chemical reaction
Product
Electrons in the outer shell of an atom, involved in forming bonds and adjacent atoms
Valence electrons
A fixed amount of energy that a system described by quantum mechanics such as a, molecule, atom, electron, or nucleus can have.
Energy level
Show the bonding between atoms of a molecule and the line pairs of electrons that may exist in the molecule
Lewis Dot Structure
Mass of an atom, equals the number of protons plus neutrons
Atomic mass
