atom
the smallest particle of an element that still has the element’s properties
compound
any combination of two or more different elements
covalent bond
a bond formed by the pairing of electrons between atoms
element
a pure substance made up of one type of atom
metallic bond
the force of attraction that holds metals together; it involves the attraction of free-floating valence electrons for positively charged metal ions
ionic bond
the electrostatic attraction that binds oppositely charged ions together
nonmetal
a class of elements with similar properties that include poor conductors of heat and electricity
electrical conductor
a substance of material that allows electricity to flow through it
anion
any atom or group of atoms with a negative charge
nucleus
a positively charged region at the center of the atom
crystal
a solid in which the atoms, ions, or molecules are arranged in an orderly, repeating, three-dimensional pattern called a crystal lattice
valence electron
electron(s) in the highest occupied energy level of an atom (the electrons in the outer shell)
electrostatic force
the attractive or repulsive force between two electrically charged objects
current
the flow of electrons
ion
an atom or group of atoms that has a positive or negative charge
cation
any atom or group of atoms with a positive charge
ionic bond
the electrostatic force that holds ion together in an ionic compound
ionic compound
a compound of positive and negative ions
covalent compounds
compounds that form from to or more nonmetallic elements
molecule
the smallest particle of a covalent compound that still has the properties of the compound
conductivity
how much a substance or material allows heat or electricity to flow through it
ductility
the ability of a material to be stretched, pulled, or drawn into a thing wire or thread without breaking
luster
the state or quality of shining by reflecting light. a physical property of metals
malleability
the ability of a metal or metal alloy to be shaped into different forms
