He was a German Chemist. In 1810, he was eventually the professor at the University of Jena. He...

He was a German Chemist. In 1810, he was eventually the

professor at the University of Jena.

He discovered similar triads of elements in 1829.

In 1817, He discovered the group of elements. He found out that Lithium, Sodium and Potassium had similarity.

Johann Wolfgang Dobereiner

LookAtThis Sexy Beast!!

Triads are some of the first families of elements with similar chemical properties.

There were three in the group.

Their appearance and reactions of the elements were similar to each other.

WHAT ARE THE TRIADS?

Alkali formers

Li 7

Na 23

K 39

Salt formers

Cl 35.5

Br 80

I 127

He began working on the Periodic Table in the late 1860s.

He arranged 63 elements known by there atomic weight.

He also organized them into similar properties.

This is his first sketch of the Periodic Table.

Dmitri Mendeleev

MENDELEEVS’ PERIODIC TABLE

Current Periodic Table

The End….

By: Ashley Olivera

Brittany SpishockJoey Rice

By: Morgan Williams&

Brooke McKenna

ARRANGEMENT OF THE PERIODIC TABLE

http://www.dayah.com/periodic/

THE PERIODIC TABLE!

A period is a horizontal column on the periodic table of elements.

There are 7 periods on the periodic table.

And a group is a column that is vertical.

There and 18 groups on the periodic table.

Periods and Groups

Groups are numbered in 2 ways, one way is 1-18 which includes all elements even the transition metals.

The second way is 1A-8A they’re known as the main groups.

More on Groups

Lanthanides- inner transition elements with atomic numbers 58-71, lanthanides are located in the top row of the f block.

Actinides- inner transition elements with the atomic numbers from 90-103; all are radioactive, actinides are located in the bottom row of the f block.

Transition elements- elements in groups 3-12 all are metals, transition elements are located in the D-block.

Lanthanides, Actinides, and Transition Elements

Solids- definite shape and volume Liquid- no definite shape, but definite

volume Gas- no definite shape or volume

3 states of matter

There are 2 liquids There are 11 gases

Noble gases are generally located on the right side

The rest are solids

http://www.dayah.com/periodic/

Solids, Liquids, and Gasesof the periodic table

By: Mike Ross, Shelby Fausey, and Kaitlyn Carl

Periodic Table

ARRANGEMENT OF THE PERIODIC

TABLE

Definitions Metal- Element that has luster, conducts heat

and electricity and usually bends without breaking.

Non-metal- Does not conduct heat or electricity. Brittle when solid. Many are gases at room temperature.

Metalloid- Element with some physically & chemically properties of metals and other properties of non-metals.

Metal Metals are located on the left side of the black

outlined step looking line. There are 61 metals on the periodic table. Examples of metal are silver, copper, iron, and

cobalt. They are used for machinery, coins, and automobiles.

Non-metals

Non-metals are located on the right side of the black line.

There are 18 non-metals on the periodic table

Sulfur, Chlorine, Iodine most are gases, one is a liquid (Bromine)

and the rest are solid.

Metalloids Metalloids are located on the either side of the

black line. There are 7 metalloids on the periodic table. Boron, Silicon, and Germanium are examples

of metalloids Metalloids are used mostly in transistors.

Group 1A

Group 1A is the Alkali Metals Alkali Metals are soft and usually have low

melting points and densities. They are also powerful reducing agents.

All react violently with water, and tarnish rapidly even in dry air. They are never uncombined in nature.

Alkali metals are sometimes used in explosives.

Group 2A Group 2A elements are the Alkaline Earth Metals. These metals are silvery colored, soft, and react

readily with halogens. They then form ionic salts. Magnesium and calcium are essential elements

for all living organisms.

Transition Elements

These elements are in groups 3-12 , all are metals.

Some transition elements are Scandium, Titanium, and Vanadium.

They are also known as transition metals. They are very hard and have high melting points and boiling points.

Transition elements are used for structural materials, copper pipes, and coins.

ARRANGEMENT OF THE PERIODIC

TABLEMegan Clark

Megan Slonaker

Zack Dorman

Group 3A elements• Boron: It is classified as a Metalloid, used in flares,

and nuclear reactor control elements.• Aluminum: light, but very strong, and is used in

kitchen utensils and aircraft industries.• Gallium: liquid in room temp, has a silvery

appearance, low vapor pressure. It’s a by product of aluminum. Also used in LED lights.

• Indium: Found in ores of zinc and tin. Used in making bearing alloys, rectifiers, and are used in making mirrors.

Group 3A cont. And Pictures

Thallium: Very soft metal, it can be cut by a knife, and its toxic. It is also in arsenic.

Boron

Aluminum

Gallium

Pictures of Group 3A

INDIUM

Thallium

Group 4A Elements Carbon: Dense, and black in color.

Found in diamonds. Silicon: Most abundant element on

earth, other than oxygen. It is a natural semiconductor. Used in steel.

Germanium: It is a grey-white metalloid. Germanium is used in electric guitar amps.

Tin: Silvery, malleable element. Tin is used to coat other metals to prevent corrosion.

Lead: Silvery-grey in appearance. It is used in some paints, and in pencils.

Group 4A Pictures

CarbonSilicon

Group 5A Nitrogen: It means without life, also it is 78.1% or

earths air. Nitrogen is also found in all living systems.

Phosphorus: A large amount of it is found in bones.

Arsenic: It can kill you, it can also cause cancer. Antimony: Toxic, poor conductor of heat and

electricity. It is found in batteries, lead, and antifriction alloys.

Bismuth: Used in cosmetics and medical procedures. Its lustrous and pink.

Group 5A Pictures

Nitrogen Phosphorus

Arsenic AntimonyBismuth

Group 6A Elements

Oxygen: Colorless gas, and a light blue liquid. We breathe it, and found in water.

Sulfur: A yellow, odorless crystal. Its found near volcanoes.

Selenium: Grayish black in color. Used in making rubber and steel alloy.

Tellurium: Silvery grey in color. Used in alloys like lead and copper, and stainless steel.

Group 6a pictures

SulfurOxygen

SeleniumTellurium Polonium

Group 7A elements Fluorine: Yellowish brown gas. Used in flat

panel display system, and Teflon. Chlorine: It’s a gas, yellow green in color.

Used in cleaning products. Bromine: Liquid at room temperature,

brownish- red color. Found in alternative chlorine for pools.

Iodine: Bluish- black in color. Found in table salt.

Astatine: Highly unstable radioactive element.

Group 7a Pictures

FluorineChlorine

Bromine Iodine Astatine

Group 8A elements

Helium: The only element that cannot be frozen in very low temperature. Used in balloons.

Neon: Its colorless, but it glows reddish orange in an electric discharge. Used in displays, and indicators.

Argon: It’s a colorless, odorless gas, that makes up 1 percent of the Earths atmosphere. Used in electric light blubs.

Krypton: Whitish in color. Used in fluorescent bulbs.

Group 8a elements and pictures

Xenon: It’s a gas at room temperature. Used in laser-pumping lamps.

Radon: A gas that’s found in the Earths crust.

Helium NeonArgon

Group 8a pictures

Krypton Xenon

Radon

Lanthanide It is the inner transition elements with

the atomic number 51-71 It is also known as a rare earth metals. Bright silvery appearance

Actinide Inner transition elements with the atomic

number from 90-103 Actinide is radioactive

TREND ON THE PERIODIC TABLE

By Casey Higgins, Shanee Hay, Matthew Hayes

Reactivity

The tendency of a substance to undergo chemical reaction, either by itself or with other materials, and to release energy

Reactivity increases when you go down the group and decreases when you go left to right.

Density

• Mass per unit volume of a substance.• D=mass/volume• Density increases as you go down the

group.

Atomic radius

The size of an atom. Moving left to right Atomic radius

Decreases and moving top to bottom atomic radius increases .

Ionized energy

Energy required to remove an electron from a specific atom.

moving left to right ionized energy increases and moving top to bottom ionized energy decreases.

Electronegativity

A chemical property that describes the ability of an atom to attract electrons towards itself in covalent bond.

Moving left to right electronegativity increases and moving top to bottom electronegativity decreases.