Download Atom The smallest piece of matter that still has the properties of the

Atom
Proton
The smallest piece of matter that still has the properties of the element.
Sub-atomic particle with positive (+) charge; located in nucleus of atom;
determines identity of element
Neutron
Electron
Nucleus
Valence Electron
Atomic Number
Sub-atomic particle with no charge; located in nucleus of atom
Sub-atomic particle with negative charge; much smaller than protons and neutrons
Located at the center of the atom. Consists of protons and neutrons. Electrons
surround the nucleus.
Electron found in outermost shell of an atom; determines atoms chemical properties
The number of protons in an atom. This number identifies the element
Mass number
Atomic Mass
Isotope
Composed mostly of protons and neutrons
Weighted average of masses of isotopes of each atom
Atom with same # of protons as other atoms of that element, but different # of
neutrons
Ion
Bohr Model
Lewis Dot
Structure
pH scale
An atom with either a positive or negative charge
Model used to visualize atomic structure
A representation of a molecule where dots are used to show electrons
A measure of how acidic or basic a substance is, based on the concentration of
hydrogen ions.
Acid
Base
Compound which decreases hydroxide ions (OH-) when dissolved in H2O
Compound which increases hydroxide ions (OH-) when dissolved in H2O
Gravitational Force
Attraction of objects due to their masses and distance; weakest force
Electromagnetic
ForceForce
Weak Nuclear
Force
Strong Nuclear
Force
Periodic Tablee
Acts between charged particles and is the combination of all electrical and
magnetic forces. The electromagnetic force can be attractive or repulsive.
Group
Vertical (up and down) column of periodic table; elements in group share chemical
properties (same # valence electrons)
The force responsible for radioactive decay and beta emission
Holds the atomic nucleus together; Counteracts the electromagnetic force
A table of the chemical elements arranged in order of atomic number, usually in
rows, so that elements with similar atomic structure and similar chemical properties
appear in vertical columns.
Period
Metals
Non-metals
Metalloids
Horizontal row of the periodic table. The periodic table has seven periods.
A substance with high electrical conductivity, luster, and malleability , which
readily loses electrons to form positive ions
Usually gases or brittle solids at room temp; are poor conductors; to right of stair
step
Have characteristics of metals and non-metals; make up stair step