Chemistry
What is Chemistry?
Chemistry is the study of the structure,
composition, and properties of matter.
Well then what is matter?
Matter is anything that takes up space!
3 Phases of Matter
What is matter made of?
The building blocks of matter are atoms.
These are the smallest unit of matter.
They are made of subatomic particles.
Subatomic Particles of an Atom
Try to Fill in your Chart…
Subatomic
Particles
Location
Mass (AMU)
Charge
Proton
Neutron
Electron
Note: An AMU(atomic mass unit) is the standard mass unit
used in determining the mass of subatomic particles. It is
based on a 1/12th the mass of a hydrogen atom.
Atoms are the building blocks of…
Elements: Collection of atoms with the
same properties. Can’t be broken down.
Elements are organized into the…
Each block on the chart represents one element. The
space provided for each element on the table
displays the atomic symbol, atomic number, and
mass number (atomic mass).
Atomic Symbol
One or two
letters, with
the first letter
always
capitalized,
and the
second letter
lowercase
Atomic Number
Number of
Protons. This
is unique for
each element.
If you change
this number,
then you
change the
element
Mass Number (atomic mass)
Equal to…
protons + neutrons
Number of
neutrons is given
based on
average number
of neutrons
typically found in
each element
Note!
In a non-charged atom, the number of
protons equals the number of electrons
NO CHARGE Protons = Neutrons