Atoms, Bonding, and the Periodic Table
electrons that are in the highest energy level and held most loosly
valence electrons
an atom or group of atoms that has an electric charge
ion
The chemical bond formed when two atoms share electron
covalent bond
metals _____ electrons easily because their valence electrons are not strongly held
lose
The simplest pure substances
Elements
represents the valence electrons of an atom. It includes the symbol for the element surrounded by dots
electron dot diagram
these form as a result of the attraction between positive and negative ions
ionic bonds
a neutral group of atoms joined by covalent bonds
molecule
an attraction between a positive metal ion and the electrons surrounding it
metallic bond
A pure substance made of two or more elements that are combined chemically in a specific ratio.
Compound
the force of attraction that holds two atoms together as a result of rearrangement of electrons between them
chemical bond
a combination of symbols that shows the ratio of elements in a compound
chemical formula
this type of compound has lower melting points and boiling points, and they do not conduct electricity when dissolved in water
molecular compound
a material made of two or more elements that has the properties of a metal
alloy
The negative, positive, and neutral parts of an atom are called?
Neutron, proton, and electron
the number of protons in the nucleus of an atom of that element
atomic number
this tells you the ratio of elements in the compound
subscript
A covalent bond in which electrons are shared unequally is ______. When the valence electrons are shared equally, the bond is ______.
polar bond, nonpolar bond
this term means easily bent and pulled into thin strands or wire
ductile
This is when two or more substances that are in the same place but are not chemically combined.
mixture
Group names for Group 1, Group 17, Group 18
Alkali Metals, Halogens, Noble Gases
the ions in an ionic compound form an orderly, three dimensional arrangement called
crystal
Some atoms form ______ in which their atoms share three pairs of electrons
triple bonds
this means able to be rolled into thin sheets or beaten into complex shapes
malleable
this is the building block of matter
elements (all matter is composed of one element or a combination of two or more elements)