Transcript Slide 1

The Periodic Table
This Section will focus on Scientists
who have had an impact on the
study of the Periodic Table.
Ready To Meet Them?
Demitri Mendeleev
Demitri Mendeleev was a
Russian scientist. He was
the first person to make
the periodic table. He also
wrote a chemistry
book.The periodic table is
a tool to help read
elements.
Mendeleev’s Table
Modern Periodic Table
How to Read the Table
Atomic
Number
Chemical
Symbol
Element
Name
6
2
C
4
carbon
Number of
Electrons
in each
energy
field
12.01115
Atomic Mass
Calculating Atomic Mass
To find the Atomic
Mass, you look at the
bottom number in the
Atom tile and round it
to the nearest whole
number.
Atomic
Mass
6
C
Carbon
12.01115
How to find number of protons
Atomic Number/
number of Protons
The number of Protons in
atom is also the Atomic
number, so therefore the
Atomic number also
represents the amount of
Protons in the nucleus of
that Atom.
6
C
CARBON
12.01115
How to Find the Amount of
Neutrons in an Atom
To find the amount
of neutrons in an
atom you have to
subtract the atomic
mass from the
atomic number .
Atomic
Mass
Atomic
Number
16
S
2
8
6
sulfur
32.064
32
16
16
Number of
protons
To determine amount of electrons
6
2
4
C
CARBON
12.01115
To find the
number of
electrons in an
atom, look at the
numbers in the
right side. To
determine the
number of energy
levels count the
number of side
numbers and
there you go!!!
How to tell what period the
element is listed
33
AS
2
8
18
5
ARSENIC
74.9160
THE
4APPEARS
ENERGY IN
LEVELS
4TH PERIOD
What's the BIG difference
The big difference between an element,
compound, and a molecule is……
Element: a substance made up of only 1 kind of
atom
Compound: a substance made up of 2 or more
DIFFERENT elements
Molecule: a grouping of 2 or more atoms joined
together
For instance . . .
This is an atom of an
element. As you can
see, it is made up of
only one kind of atom
H
. . In this case
Hydrogen
Now, with a compound
O
H
O
When two or more
atoms are put
together it makes a
compound.
How elements are formed
Elements are formed with a nucleus, and
inside the nucleus is protons and neutrons.
Around the nucleus are energy fields, and
inside the energy fields are are electrons.
Sulfur
Vocabulary
Electron
Neutron
Proton
Nucleus
Compound
Atom
Isotope
element
Electron
fields
Mass
Atomic
structure
Periodic table
Chemical
symbol
Suggested Vocabulary
Element name
chemist
properties
matter
electron cloud
synthetic
metal
metalloid
Solid
liquid
gas
noble gasses
subatomic
Nonmetals
particles
Check out some of these helpful
websites to do some research of
your own . . .
•A periodic table of Elements
•Periodic Table Adventure
•Science Education at
Jefferson Lab
Contributor's
Jessica Osorio
Morgan Chacon
Julian Rojas
Tony Rinaldi
Lennis Montoya
Josh Quezada
Josh Olea
Jackie Cakmak
Rebekah Flores
Karly Perez
Nick Waldovogel