Warm-up: SILENTLY
preview the ten
BrainPop questions
on Atoms
# 10 is referring to
this:
When you have
finished the BrainPop:
SILENTLY preview the
Bill Nye questions
on Atoms
Warm-up: Review from yesterday - Elements
1) Identify what the three arrows below are
pointing to.
6
C
12.011
2) How many protons, neutrons, and electrons
does this element have?
Warm-Up: Elements
Each table square includes the atomic number, element symbol, and atomic
mass. Label these on the lines below.
6
atomic number
C
element symbol
12.011
atomic mass
Protons are positively charged and electrons are negatively charged. This
creates a neutral charge for each element.
Standard: S8P1
Recognize that there are more than 100
elements and that some share similar
properties as shown on the Periodic Table
of the Elements
Essential Question: What is the
justification for the organization of
elements on the Periodic Table?
What is the PERIODIC TABLE?
oShows
all known elements
in the universe.
oOrganizes
the elements
by chemical properties.
I am Dmitri Mendeleev!
I made the PERIODIC TABLE !
Mendeleev
• In 1869, Dmitri Ivanovitch Mendeléev
created the first accepted version of the
periodic table.
• He grouped elements according to their
atomic mass, and as he did, he found
that the families had similar chemical
properties.
• Blank spaces were left open to add the
new elements he predicted would
occur.
Warm-Up 09/29/14
•Explain how
Mendeleev
organized his
“Table of the
Elements.”
•What was his
justification for
organizing the
elements the way
he did?
Periodic Table
The periodic table is a table of chemical elements arranged by atomic
number.
Chemical Symbols
Each chemical symbol is made up of one or two letters. As new elements are
discovered, the person who discovered the element has the privilege of
naming it. Using the Periodic Table provided, name these chemical symbols.
F
B
Au
Mn
He
S
Ca
Al
Cl
Na
O
Cu
Chemical Symbols
Each chemical symbol is made up of one or two letters. As new elements are
discovered, the person who discovered the element has the privilege of
naming it. Name these chemical symbols.
F
Fluorine
B
Boron
Au
Gold
Mn
Manganese
He
Helium
S
Sulfur
Ca
Calcium
Al
Aluminum
Cl
Chlorine
Na
Sodium
O
Oxygen
Cu
Copper
Cu stands for _____.
a. Copper
b. Chlorine
c. Curium
d. Carbon
Properties of Metals
• Metals are good conductors of heat and
electricity.
• Metals are shiny.
• Metals are ductile (can be stretched into
thin wires).
• Metals are malleable (can be pounded into
thin sheets).
• A chemical property of metal is its reaction
with water which results in corrosion.
Properties of Non-Metals
• Non-metals are poor conductors of
heat and electricity.
• Non-metals are not ductile or
malleable.
• Solid non-metals are brittle and
break easily.
• They are dull.
• Many non-metals are gases.
Sulfur
Properties of Metalloids
• Metalloids (metal-like) have properties of
both metals and non-metals.
• They are solids that can be shiny or dull.
• They conduct heat and electricity better
than non-metals but not as well as metals.
• They are ductile and malleable.
Silicon
Warm-up:
•Looking at your
own Periodic
Table of the
Elements,
identify two
properties that
Iron and Sodium
have in common.
09/30/14
Organization: Groups or Families
The elements in the periodic table are arranged in vertical columns called
groups or families. Elements in a family share chemical properties.
Organization: Periods
The horizontal rows in the periodic table are called periods. Elements in a
period contain very different properties.
Families
• Columns of elements are
Periods
• Each horizontal row of
elements is called a period.
called groups or families.
• Elements in each family
• The elements in a period are
have similar but not
not alike in properties.
identical properties.
• In fact, the properties
• For example, lithium (Li),
sodium (Na), potassium (K), change greatly across even
given row.
and other members of
family IA are all soft, white, • The first element in a period
shiny metals.
is always an extremely
• All elements in a family
active solid. The last
have the same number of
element in a period, is
valence electrons.
always an inactive gas.
What does it mean to be reactive?
• We will be describing elements according to their
reactivity.
• Elements that are reactive bond easily with other
elements to make compounds.
• Some elements are only found in nature bonded with
other elements.
• What makes an element reactive?
• An incomplete valence electron level.
• All atoms (except hydrogen) want to have 8 electrons in their
very outermost energy level (This is called the rule of octet.)
• Atoms bond until this level is complete. Atoms with few valence
electrons lose them during bonding. Atoms with 6, 7, or 8
valence electrons gain electrons during bonding.
Hydrogen
•The hydrogen square sits atop Family AI,
but it is not a member of that family.
Hydrogen is in a class of its own.
•It’s a gas at room temperature.
•It has one proton and one electron in its
one and only energy level.
•Hydrogen only needs 2 electrons to fill up
its valence shell.
Alkali Metals
•The alkali family is
found in the first column
of the periodic table.
•Atoms of the alkali
metals have a single
electron in their
outermost level, in other
words, 1 valence
electron.
•They are shiny, have the
consistency of clay, and
are easily cut with a
knife.
Alkali Metals
•They are the most
reactive metals.
•They react violently
with water.
•Alkali metals are
never found as free
elements in nature.
They are always
bonded with another
element.
5
Alkaline Earth Metals
•They are never found uncombined in
nature.
•They have two valence electrons.
•Alkaline earth metals include magnesium
and calcium, among others.
Transition Metals
•Transition Elements
include those elements in
the B families.
•These are the metals you
are probably most
familiar: copper, tin, zinc,
iron, nickel, gold, and
silver.
•They are good conductors
of heat and electricity.
Transition Metals
• The compounds of transition metals are usually
brightly colored and are often used to color paints.
• Transition elements have 1 or 2 valence electrons,
which they lose when they form bonds with other
atoms. Some transition elements can lose electrons in
their next-to-outermost level.
Transition Elements
•Transition elements have properties similar
to one another and to other metals, but
their properties do not fit in with those of
any other family.
•Many transition metals combine chemically
with oxygen to form compounds called
oxides.
General
- Warm-Up 10/02/14
•Describe some similar
properties of the elements in
the Alkaline Earth Metals
family.
Alkaline Earth Metals
•They are never found uncombined in
nature.
•They have two valence electrons.
•Solids
•Metals
Advanced
- Warm-Up 10/02/14
•How are the Alkaline Earth
Metals different than the
Alkali Metals? How do you
think these differences in
properties affects their
reactivity?
Boron Family
•The Boron Family is named
after the first element in the
family.
•Atoms in this family have 3
valence electrons.
•This family includes a
metalloid (boron), and the
rest are metals.
•This family includes the
most abundant metal in the
earth’s crust (aluminum).
Carbon Family
•Atoms of this family have 4
valence electrons.
•This family includes a nonmetal (carbon), metalloids,
and metals.
•The element carbon is called
the “basis of life.” There is an
entire branch of chemistry
devoted to carbon
compounds called organic
chemistry.
Nitrogen Family
• The nitrogen family is named
after the element that makes
up 78% of our atmosphere.
• This family includes nonmetals, metalloids, and
metals.
• Atoms in the nitrogen family
have 5 valence electrons.
They tend to share electrons
when they bond.
• Other elements in this family
are phosphorus, arsenic,
antimony, and bismuth.
Oxygen Family
• Atoms of this family have 6
valence electrons.
• Most elements in this family
share electrons when
forming compounds.
• Oxygen is the most
abundant element in the
earth’s crust. It is extremely
active and combines with
almost all elements.
Halogen Family
•The elements in this
family are fluorine,
chlorine, bromine, iodine,
and astatine.
•Halogens have 7 valence
electrons, which explains
why they are the most Halogen atoms only need to gain 1
to fill their outermost energy
active non-metals. They electron
level.
are never found free in They react with alkali metals to form salts.
nature.
Noble Gases
• Noble Gases are colorless gases that are extremely un-reactive.
• One important property of the noble gases is their inactivity. They are inactive
because their outermost energy level is full.
• Because they do not readily combine with other elements to form compounds,
the noble gases are called inert.
• The family of noble gases includes helium, neon, argon, krypton, xenon, and
radon.
• All the noble gases are found in small amounts in the earth's atmosphere.
Rare Earth Elements
• The thirty rare earth
elements are composed of
the lanthanide and actinide
series.
• One element of the
lanthanide series and most of
the elements in the actinide
series are called transuranium, which means
synthetic or man-made.
The Periodic Table
Click the table to view a video on the periodic table.
You would expect Lithium (Li) and Carbon (C) to share some of the same
chemical properties since they are elements in the same period.
a. True
b.
False
False!
•Elements in the
same group or family
(vertical column)
share characteristics.
Elements in the same
period (horizontal
row) have very
different properties.
But not as handsome!
Man, I look GOOD!
Warm-up 10/03/14
• Identify this element.
A) Give atomic mass
B) Give atomic number
C) Give number of protons
D) Give number of neutrons
E) Give number of electrons
F) Identify its period
G) Identify its family
H) Identify its state of matter
I) Identify if it is a metal, non-metal, or
metalloid
J) Identify its number of valence electrons
K) What is its name?
L) Is it an isotope?