Periodic Table

CARBON

Oct 28, 1000

For example, diamond is highly transparent, while graphite is opaque and black. Diamond is among the hardest materials known, while graphite is soft enough to form a streak on paper (hence its name, from the Greek word "to write"). Diamond has a very low electrical conductivity, while graphite is a very good conductor. Under normal conditions, diamond has the highest thermal conductivity of all known materials.
All carbon allotropes are solids under normal conditions with graphite being the

LEAD

Oct 28, 1000

1000(BCE) is used in building construction, lead-acid batteries, bullets and shot, weights, as part of solders, pewters, fusible alloys, and as a radiation shield.

SULFUR

Oct 28, 1000

uses in ancient Greece, China and Egypt.

ARSENIC

Oct 28, 1250

The main use of metallic arsenic is for strengthening alloys of copper and especially lead (for example, in car batteries).

ZINC

Oct 28, 1500

IS A SILVER -GRAY METALIC ELEMENT .IS USED TO FORM ALLOYS ,INCLUDING BRASS ,BRONZE AND NICKEL.

ANTIMONY

Oct 28, 1600

1600(BCE)The largest applications for metallic antimony are as alloying material for lead and tin and for lead antimony plates in lead-acid batteries. Alloying lead and tin with antimony improves the properties of the alloys which are used in solders, bullets and plain bearings.

PHOSPHORUS

Oct 28, 1669

The term "phosphorescence", meaning glow after illumination, originally derives from this property of phosphorus, although this word has since been used for a different physical process that produces a glow. The glow of phosphorus itself originates from oxidation of the white (but not red) phosphorus— a process now termed chemiluminescence.

PLATINUM

Oct 28, 1735

IS A DENSE GRAYISH-WHITE TRANSITION METAL.IT ABSORBE AMOUNTS OF HYDROGEN

NICKEL

Oct 28, 1751

IT IS SILVER WHILE METAL, CAPABLE OF TAKING A HIGH POLISH, IS HARD DUCTILE, MALLEABLE, AND FERROMAGNETIC. IT IS A FAR CONDUCTOR OF THE HEAT AND ELECTRICITY. IT IS USE TO MAKE STAINLESS STEEL, COPPER-NICKEL TUBING.

NITROGEN

Jan 1, 1772

Is obtained from liquefied air through a process known as ffractonal distillation. Is used to produce amonia that then is used to create fertilizers asn explosives. Nitrogen is a chemical element with symbol N and atomic number 7. Elemental nitrogen is a colorless, odorless, tasteless, and mostly inert diatomic gas at standard conditions, constituting 78.09% by volume of Earth's atmosphere.

CHLORINE

Oct 28, 1774

Is an element that is obtained from clorides by electrolysis.Is used in many everyday products. As a desinfectant of drinking water, in production of textiles, medicine, plastics paint and many other products.

OXYGEN

Oct 28, 1774

IS A COLORLESS AND ODORLESS AND TASTELESS GAS .THE LIQUID AND SOLID FORM ARE PLATE BLUE COLOR .IS USED BY ANIMALS AND PLANTS FOR REPIRATION.

ALUMINIUM

Oct 28, 1825

PURE ALUMINIUM IS A OILVER -WHILE METAL .IT IS LIGHT ,AND NON -TOXIC.IS USED IN KITCHEN UTENSILES AND EXTERIORS DECORATION .

FLOURINE

Oct 28, 1866

IS ACORROSIVE PALE YELLOW GAS .IS HIGHLY REACTIVE IS THE ELCTRO NEGATIVE ELEMENT.METAL ,GAS,CARBON AND WATER WILL BURN WITH A BRIGHT FLAME OF FLOURINE.IS USED TO PRODUCE URANIUM ,IN THE DRINKING WATER ,TO MOTTLED ENAMEL IN TEETH SKELETAL FLUOROSIS AND HELP TO REDUCE DENTAL CANES.

ARGON

Oct 28, 1894

ARGON GAS IS PREPARED BY FRACTIONATING LIQUID AIR. IT USE IN ELECTRIC LIGHTS AND FLOURECENT TUBES ,PHOTO TUBES AND IN LASERS. IS USED AS AN INERT GAS FOR WELDING AND CULTING BLANKETING REACTIVE ELEMENTS.

HELIUM

Oct 28, 1895

IS A VERY LIGHT , INERT COLORLESS, GAS. IS THE ONLY LIQUID THAT SOLIDIFIED BY LOWERING THE TEMPERATURE. IT USE IN THE STUDY OF SUPER CONDUCTIVITY. IT'S USED FOR FILLING BALLOONS AND BLIMPS.

NEON

Oct 28, 1898

NEON IS A RARE GASEOUS ELEMENT. IT IS PRESENT THE ATMOSTPHERE TO THE EXTENT OF ONE PART PER 65,000 OF AIRE. NEON IS OBTAIN BY LIQUEFACTION OF AIRE AND SEPERATION USING FRACTIONAL DISTILATION. IT IS USE TO MAKE SIGNS, TELEVISION TUBES, AND WAVEMETER TUBES.

KRYPTON

Oct 28, 1898

used in lighting and photograph

PLONIUM

Oct 28, 1898

Because of its position in the periodic table, polonium is sometimes referred to as a metalloid,[1] however others note that on the basis of its properties and behavior it is "unambiguously a metal"

RADIUM

Oct 28, 1898

Plutonium is a transuranic radioactive chemical element with the symbol Pu and atomic number 94. It is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, forming a dull coating when oxidized. The element normally exhibits six allotropes and four oxidation states. It reacts with carbon, halogens, nitrogen, and silicon.

ACTINIUM

Oct 28, 1899

A soft, silvery-white radioactive metal, actinium reacts rapidly with oxygen and moisture in air forming a white coating of actinium oxide that prevents further oxidation.

RADON

Oct 28, 1900

Radon is formed as one intermediate step in the normal radioactive decay chains, through which thorium and uranium slowly decay into lead.

FRANCIUM

Oct 28, 1939

Francium was discovered by Marguerite Perey in France (from which the element takes its name) in 1939. It was the last element discovered in nature, rather than by synthesis.[

PLUTONIUM

Oct 28, 1940

Plutonium is a transuranic radioactive chemical element with the symbol Pu and atomic number 94. It is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, forming a dull coating when oxidized. The element normally exhibits six allotropes and four oxidation states. It reacts with carbon, halogens, nitrogen, and silicon.

AMERICIUM

Oct 28, 1944

It is widely used in commercial ionization chamber smoke detectors, as well as in neutron sources and industrial gauges.

DUBNIUM

Oct 28, 1970

It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and radioactive; the most stable known isotope, dubnium-268, has a half-life of approximately 28 hours.[6

TIN

Oct 28, 2100

2100(BCE) used to coat other metals to prevent corrosion.

SILVER

Oct 28, 2500

2500(BCE)is used as an investment, to make ornaments, jewelry, high-value tableware, utensils (hence the term silverware), and currency coins.

IRON

Oct 28, 2500

2500(BCE)IS ABUNDANT IN THE UNIVERSE .Iron metal has been used since ancient times, though copper alloys, which have lower melting temperatures, were used first in history. Pure iron is soft (softer than aluminium), but is unobtainable by smelting. The material is significantly hardened and strengthened by impurities from the smelting process, such as carbon. A certain proportion of carbon (between 0.2% and 2.1%) produces steel, which may be up to 1000 times harder than pure iron. Crude iron met

GOLD

Oct 28, 3000

3000(BCE)Gold has been a valuable and highly sought-after precious metal for coinage, jewelry, and other arts since long before the beginning of recorded history.

COPPER

Oct 28, 5000

5000(BCE)is used as a conductor of heat and electricity, a building material, and a constituent of various metal alloys.