Download ATOMS ELEMENTS PERIODIC TABLE MOLECULES COMPOUNDS

ATOMS ELEMENTS PERIODIC
TABLE MOLECULES COMPOUNDS
atom
• the smallest component of an element having
the chemical properties of the element,
consisting of a nucleus containing
combinations of neutrons and protons and
one or more electrons bound to the nucleus
by electrical attraction; the number of protons
determines the identity of the element.
Atomlithium
ATOMS
Element
• Chemistry. one of a class of substances that
cannot be separated into simpler substances
by chemical means. Listed on the periodic
table of elements.
PERIODIC TABLE
• a table illustrating the periodic system, in
which the chemical elements, formerly
arranged in the order of their atomic weights
and now according to their atomic numbers,
are shown in related groups.
PERIODIC TABLE
PERIODIC TABLE
• http://www.uky.edu/Projects/Chemcomics/in
dex.html
TRENDS ON THE PERIODIC TABLE
GOING ACROSS-- INCREASING NUMBER OF
ELECTIONS
GOING DOWN INCREASING NUMBER OF
ELECTRON SHELLS & INCREASING RADIUS
(LARGER)
GROUPS HAVE SIMILAR PROPERTIES
MOLECULES
• Chemistry, Physics. the smallest physical unit
of an element or compound, consisting of one
or more like atoms in an element and two or
more different atoms in a compound.
COMPOUNDS
• A compound is a substance formed when two
or more chemical elements are chemically
bonded together.
• Two types of chemical bonds common in
compounds are covalent bonds and ionic
bonds.
COMPOUNDS
• What is the difference between a compound and a molecule?
• A molecule is formed when two or more atoms join together
chemically. A compound is a molecule that contains at least two
different elements. All compounds are molecules but not all
molecules are compounds.
• Molecular hydrogen (H2), molecular oxygen (O2) and molecular
nitrogen (N2) are not compounds because each is composed of a
single element. Water (H2O), carbon dioxide (CO2) and methane
(CH4) are compounds because each is made from more than one
element. The smallest bit of each of these substances would be
referred to as a molecule. For example, a single molecule of
molecular hydrogen is made from two atoms of hydrogen while a
single molecule of water is made from two atoms of hydrogen and
one atom of oxygen.
COMPOUND OR MOLECULE?
COMPOUND OR MOLECULE?