Group+04

OwenK. __Group 4__




 * __Definiton__**: Incudes Titanium, Zirconium, Hafnium, Rutherfordium all of these are metals and solids at room temperture. All these are transition metals. These also have 4 electrons http://en.wikipedia.org/wiki/Group_4_element

__Titanium__ Symbol: Ti Atomic Number:22 Atomic Mass:47.9 Isotopes: Composed of five stable isotopes: Ti, 47 Ti, 48 Ti, 49 Ti, 50 Ti Out of these five 48 Ti is the most common form. There are eleven radioisotopes that have been charactorized the most stable being 44 Ti which has a half life of 63 years, 45 Ti with a half life of 184.8 minutes, and Ti with a half life of 1.7 minutes. The rest have a half life of under 33 seconds and most under half a second. History: discovored in norway in 1923 by two scientists by the name of Dirk Cruser and Georg von Hevesy Uses: propeller shafts, rigging, and other boat parts. this is also used in planes rockets and missiles. Phisical properties and Chemical properities: Melting Point: 1668ºC Boiling Point: 3287ºC Density: 4.5 grams per cubic cm. State at room temp.: solid Classification: Metal Ductility: elongation 40%-60% reduction 45%-65% Maliability: is maliable when warmed Flammability: nonflammable reaction with oxygen: titanium Oxide used in paint, sunscreen ect. Reactivity: rises with tempertutre Electron Configuration:[Ar] 3d 2 4s 2

__Zirconium__ m Symbol: Zr Atomic Number: 40 Atomic Mass:91.22 Isotopes: There are five naturaly occuring isotopes. Fifteen others are known to exist.

History : this was discovored by Humphry Davy in 1808 Phisical properties and Chemical properities: Melting Point: 1855ºC Boiling Point: 4409ºC Density: 6.52 grams per cubic cm. State at room temp.: solid Classification: metal ductility: is ductile Maliabillity: is maliable flamability: is not flamable reaction with oxygen: zirconium dioxide used for dimond simulate reactivity: rises with temp. Electron Configuration: [Kr] 4d2 5s2 Common Compounds:

__Hafnium__ Symbol: Hf Atomic Number: 72 Atomic Mass: 178.49 Isotopes: 5 stable: 174 Hf half 2.0x10 +15 life of 175 Hf 176 Hf 177 Hf 178 Hf 179 Hf 180 Hf History: discovored in norway in 1923 by two scientists by the name of Dirk Cruser and Georg von Hevesy Phisical properties and Chemical properities: Melting Point: 2233ºC Boiling Point: 4603ºC Density: 14.3 grams per cubic cm. State at room temp.: solid Classification: metal ductility: Ductile Maliability: Maliable Flamability: non-flamable Reaction with oxygen: Mades Hafnium (IV) oxide can be used for insulating electrical wires reactivity: Under high temp. this element is reactive with Boron and Carbon Sources. Electron Configuration: [Xe] 4f 14 5d 2 6s 2 Common Compounds:

__**Ruthorfordium**__ Symbol: Rf Atomic Number: 104 Atomic Mass: 267 Isotopes: this element has no stable isotopes an atomic mas cannot be given History: this element was found by the Joint Institte Of Nuclear Research in 1966

__**Fun Facts**__

Titanium didn't get it's name until 4 years after it was discovered in 1923.

Zirconium gets its name from the persian word meaning"golden heu".

Hafnium does not exsist as a free element in our atmostphere.

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