Evan Luton Web Elements Uranium Atomic symbol is U Atomic number is 92 Atomic mass is 23802 Half life of Uranium238 is 447 billion years Uranium gives interesting yellow and green colors and fluorescence effects when included to glass ID: 446392
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Slide1
Periodic Table
Evan Luton
Web ElementsSlide2
Uranium
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.Slide3
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 kryptonSlide4
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 quantitySlide5
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 metalSlide6
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 flameSlide7
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 compoundsSlide8
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". Slide9
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 oceansSlide10
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 castSlide11
Yttrium
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 screensSlide12
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 Slide13
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 temperatureSlide14
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
nitrogenSlide15
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
calciumSlide16
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 waterSlide17
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
glassesSlide18
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 burnSlide19
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.Slide20
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 personSlide21
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 silversSlide22
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
chlorideSlide23
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, USASlide24
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
temperaturesSlide25
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 electronSlide26
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