Periodic Table
Evan Luton
Web Elements
Uranium
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Atomic symbol is U
Atomic number is 92
Atomic mass is 238.02
Half life of Uranium-238 is 4.47 billion years
Uranium gives interesting yellow and green
colors and fluorescence effects when included
to glass.
Neon
• Obtained as a byproduct from the liquefaction
and separation of air
• Discovered by Sir William Ramsay and Morris
Travers in 1898
• Discovered shortly after krypton
Iron
• Iron filings salts cause sparks in flames
• Smelted iron artifacts have been identified
from around 3000 B.C.
• Iron is a relatively abundant element in the
universe
• It is found in the sun and many types of stars
in considerable quantity
Zinc
• Zinc-deficient animals require 50% more food
to gain the same weight of an animal supplied
with normal amounts of zinc
• Plating thin layers of zinc on to iron or steel is
known as galvanizing and helps to protect the
iron from corrosion
• Zinc is a bluish-white, lustrous metal
Radium
• Emits α (alpha) β (beta) and γ (gamma) rays
• Pure metallic radium is brilliant white when
freshly prepared, but blackens on exposure to
air
• Radium conveys a carmine red color to a
flame
Xenon
• Xenon is a "noble" gas present in the
atmosphere
• Xenon is present in the Martian atmosphere
• Before 1962, it was generally assumed that
xenon and other noble gases were unable to
form compounds
Vanadium
• Pure vanadium is a greyish silvery metal, and
is soft and spongy
• Industrially, most vanadium produced is used
as an additive to improve steels
• The discovery of vanadium happened "twice".
Manganese
• Manganese metal is gray-white, resembling
iron, but is harder
• The metal is reactive chemically, and
decomposes cold water slowly
• Manganese is widely distributed throughout
the animal kingdom
• Manganese is present in quantity the floor of
oceans
Iridium
• Ruthenium, rhodium, palladium, osmium,
iridium, and platinum together make up a
group of elements referred to as the platinum
group metals
• The name iridium is appropriate, for its salts
are highly colored
• Iridium is white, similar to platinum, but with
a slight yellowish cast
Yttrium
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Yttrium has a silvery-metallic luster
Yttrium turnings ignite in air
Yttrium is found in most rare-earth minerals
Moon rocks contain yttrium and yttrium is
used as a "phosphor" to produce the red color
in television screens
Argon
• Argon is a colorless and odorless gas present
to a very small extent in the atmosphere
• Argon is very inert and is not known to form
true chemical compounds
• It makes a good atmosphere for working with
air-sensitive materials since it is heavier than
air
Caesium
• Caesium is known as cesium in the USA
• It is silvery gold, soft, and ductile
• It is the most electropositive and most alkaline
element
• Caesium, gallium, and mercury are the only
three metals that are liquid at or around room
temperature
Titanium
• Titanium is a lustrous, white metal when pure
• Titanium minerals are quite common
• The metal has a low density, good strength, is
easily fabricated, and has excellent corrosion
resistance
• The metal burns in air and is the only element
that burns in nitrogen
Nitrogen
• Nitrogen makes up about 78% of the
atmosphere
• The atmosphere of Mars contains less than 3%
nitrogen
• When nitrogen is heated, it combines directly
with magnesium, lithium, or calcium
Ytterbium
• Ytterbium has a bright silvery luster, is soft,
malleable, and spongy
• While itis fairly stable, it should be kept in
closed containers to protect it from air and
moisture
• Ytterbium is readily attacked and dissolved by
mineral acids and reacts slowly with water
Barium
• Barium is a metallic element, soft, and when
pure is silvery white like lead
• The metal oxidizes very easily and it reacts
with water or alcohol
• Barium is one of the alkaline-earth metals
• Small amounts of barium compounds are used
in paints and glasses
Helium
• Helium is one of the noble gases
• Helium gas is an unreactive, colorless, and
odorless monoatomic gas
• Helium is the second most abundant element
in the universe after hydrogen
• Helium is used in lighter than air balloons and
while heavier than hydrogen, is far safer since
helium does not burn
Tantalum
• Tantalum is a greyish silver, heavy, and very
hard metal
• When pure, it is elastic and can be drawn into
fine wire
• Tantalum is almost completely immune to
chemical attack at temperatures below 150°C
• The element has a melting point exceeded
only by tungsten and rhenium.
Bohrium
• Bohrium is a synthetic element that is not
present in the environment at all
• The German discoverers at GSI proposed the
name Nielsbohrium
• IUPAC is happy to name an element after Bohr
but suggest bohrium on the grounds that the
first name of a person does not appear in the
names of any other element named after a
person
Gold
• Most metals are metallic grey or silvery white
whereas gold is characteristically a metallic
yellow color, in other words gold-colored
• Small amounts of other metals alloyed with gold
change the color as well as mechanical properties
such as hardnes
• White gold for jewelry is formed by mixing
palladium, silver, or nickel with gold, although the
result is green gold with certain proportions of
silvers
Potassium
• Potassium is a metal and is the seventh most
abundant and makes up about 1.5 % by
weight of the earth's crust
• Potassium is an essential constituent for plant
growth and it is found in most soils
• It is also a vital element in the human diet
• Potassium is never found free in nature, but is
obtained by electrolysis of the chloride
Nobelium
• Nobelium is a radioactive "rare earth metal"
named after Alfred Nobel who discovered
dynamite
• A team working in Stockholm reported in 1957
an isotope whose atomic number is 102
• An authenticated discovery of nobelium was
made in 1958 by Seaborg and others at
Berkeley, California, USA
Tungsten
• Pure tungsten is a steel-gray to tin-white
metal
• Tungsten has the highest melting point and
lowest vapor pressure of all metals, and at
temperatures over 1650°C has the highest
tensile strength
• The metal oxidizes in air and must be
protected at elevated temperatures
Beryllium
• It is a metal and has a high melting point
• At ordinary temperatures, beryllium resists
oxidation in air
• Beryllium compounds are very toxic
• Its ability to scratch glass is probably due to
the formation of a thin layer of the oxide
• Its chemistry is dominated by its tendency to
lose an electron
Platinum
• Ruthenium, rhodium, palladium, osmium,
iridium, and platinum together make up a
group of elements referred to as the platinum
group metals
• Platinum is a silvery-white metal, when pure,
and is soft and flexible
• Hydrogen and oxygen gas mixtures explode in
the presence of platinum wire