VinhNguyen______+Barium

VinhNguyen:

Project:Barium
Element Name: Barium Symbol Name: Ba Atomic Number: 56 Atomic Mass: 137.327. Number Protons: 56 Number Electrons: 56 Number neutrons :81 Most Common Isotope:Ba with protons was 56 and the mass is 137 Electrons Configuration:[Xe]6s2 Group:2 Period:6 Melting Point: 725.0 °C (998.15 °K, 1337.0 °F) Boiling Point: 1140.0 °C (1413.15 °K, 2084.0 °F) Crystal Structure: Cubic Density 293 K: 3.51 g/cm3 Color: Silver 1 Physical and Chemical Properties: Barium is a silvery-white metal that can be found in the environment, where it exists naturally. It occurs combined with other chemicals, such as sulfur, carbon or oxygen. Ii is very light and its density is half that of iron. Barium oxidizes in air, reacts vigoroulsy with water to form the hydroxide, liberating hydrogen. Barium reacts with almost all the non-metals, forming often poisouning compounds and Barium compounds are also used to make paint, bricks, tiles, glass, and rubber. Barium nitrate and clorate give fireworks a green colour.

2 ** History: **Barium g //reek// "barys" meaning heavy was first identified in //1774// by carl scheele  and extracted in //1808// by Sir humphury  davy in england. The oxide was at first called barote, by Guyton, which was changed by antoine  Lavoisier to baryta, which soon was modified to "barium" to describe the metal.

3Common Forms: Anyway, we're synthesizing Barium iodate monohydrate, Ba(IO3)2 H2O. First we added Sodium chlorate, NaClO3(s), powered Iodine, I2(s), and Nitric acid, HNO3(aq) to a kjeldahl flask, and heated with an open flame. After heating, we poured the solution into a beaker, heated on a hot plate, and added a hot solution of Barium nitrate, Ba(NO3)2(aq) to this solution, giving us our product, which we then isolated via.And the Barium was compound t he most important compounds are barium  peroxide, <span style="color: #000000; font-weight: normal; font: italic normal bold 10pt/normal Arial;">chloxide , <span style="color: #000000; font-weight: normal; font: italic normal bold 10pt/normal Arial;">sulfate , <span style="color: #000000; font-weight: normal; font: italic normal bold 10pt/normal Arial;">carbonate ,<span style="color: #000000; font-weight: normal; font: italic normal bold 10pt/normal Arial;">nitrate , and <span style="color: #000000; font-weight: normal; font: italic normal bold 10pt/normal Arial;"> cholrate

4 Isotope:<span style="font-family: Verdana,Arial; font-style: normal;"> Naturally occurring barium is a mix of seven stable isotope. There are twenty-two //isotopes// known, but most of these are highly <span style="color: #000000; font-weight: normal; font: italic normal bold 10pt/normal Arial;">radioactive and have //haft life// in the several millisecond to several minute range. The only notable exception is barium-133 which has a //half life// of 10.51 years. The decay of Ba131 was followed for 9 half-lives using an end-window beta proportional counter, and the half-life was found to be 11.52+/-0.08 days. The ratio of the pile neutron cross section for the activation of Ba131 to that of long-lived Ba133 has been found to be σ(Ba130)σ(Ba132)=1.2+/-0.3

5__Diagram:__ 6 Bioliography:this barium from the present [|http://www.encyclopedia.com/topic/barium.aspx]

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this barium from the past

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