Elements

Caesium

• Caesium is a metal
• he atomic number for caesium is 55.
• It has a melting point of 28°C (82°F)
• At room temperature, cesium is a solid
• It has a boiling point of ​671°C (1240°F)

Caesium

• Its atomic mass is 132.90545196
• The symbol for caesium is Cs
• Robert Bunsen and Gustav Kirchhoff discovered it
• Caesium is very soft.
• It has the lowest hardness of all elements, 0.2 Mohs

Caesium

• Caesium hydroxide is hygroscopic and a very strong base
• It has a total of 39 isotopes that range in its mass number
• Caesium metal is highly reactive and very pyrophoric
•  The name caesium comes from Latin "caesius"
• Its first isolation was by Carl Setterberg in 1882

Caesium

• Thermal conductivity: 35.9 W·m−1·K−1
• The atomic radius is 265 pm
• Its heat of fusion is 2.09 kJ·mol−1
• Its heat of vaporization is 63.9 kJ·mol−1
• The element category it's in is alkali metal

Caesium

• Caesium is mined mostly from pollucite
• Caesium is only mildly toxic.
• Its desity is 1.93 g·cm−3
• Its covalent radius is  244±11 pm
• The caesium ion is larger and softer than lighter alkali metals

Actinium

• Actinium's symbol is Ac
• Its atomic number is 89
• The atomic mass is 227
• Actinium is a metal
• Friedrich Oskar Giesel discovered it

Actinium

• The first isolation was by Friedrich Oskar Giesel
• The melting point is 1500 K ​(1227 °C, ​2240 °F)
• The boiling point is 3500±300 K ​(3200±300 °C, ​5800±500 °F)
• The heat of fusion of Actinium is 14 kJ·mol−1
• The heat of vaporization of Actinium is 400 kJ·mol−1

Actinium

• It is a solid at room temperature
• Actinium is silvery-white, glowing with blue light
• Actinium has no significant industrial use
• The name actinium originates from the Ancient Greek "aktis"
• Thermal conductivity: 12 W·m−1·K−1

Actinium

• Actinium trifluoride can be produced either in solution or in solid reaction
• Uraninite ores have elevated concentrations of actinium
• Ac was first produced artificially at the Institute for Transuranium Elements
• It is highly radioactive
• Actinium was dixcovered in 1899

Actinium

• Actinium decays at a half-life of 21
• It's an agent for radiation therapy targeting cancer cells in the body.
• Actinium reacts rapidly with oxygen and moisture in air
• There are many similarities between actinium and lanthanum
• Actinium's molar heat capacity is 27.2 J·mol−1·K−1

Berkelium

• Berkelium's atomic number is 97
• The Symbol for Berkelium is Bk
• The atomic mass is 247
• Berkealium's is a silvery color
• At room temp., it is a solid

Berkelium

• The density is alpha: 14.78 g·cm−3 
• Boiling point: 2900 K ​(2627 °C, ​4760 °F)
• Melting point: 1259 K ​(986 °C, ​1807 °F)
• The atomic radius is 170 pm
• The thermal conductivity is 10 W·m−1·K−1

Berkelium

• Named after Berkeley, California, where it was discovered
• Discovered by Lawrence Berkeley National Laboratory in 1949
• All berkelium isotopes have a half-life far too short to be primordial.
• Berkelium is relatively soft and has one of the lowest bulk moduli among the actinides
• Its element category is actinide

Berkelium

• The berkelium-249 isotope emits low-energy electrons
• Electronegativity is 1.3 on the Pauling scale
• berkelium behaves as a Curie–Weiss paramagnetic material
• At ambient conditions, berkelium assumes its most stable form
• Berkelium dissolves in various aqueous inorganic acids

Berkelium

• A few atoms of berkelium can be produced by neutron capture reactions
• Just over one gram of berkelium has been produced in the United States since 1967.
• Burkelium was the fifth transuranium element discovered
• It is located to the right of the actinide curium.
• Burkelium is paramagnetic.

Tin

• The symbol for tin is Sn
• The atomic number is 50
• Its atomic mass is 118.710
• Tin is a post-transition metal
• At room temperature, it is a solid

Tin

• Melting point: 231.93°C, ​449.47°F
• Boiling Point: 2602 °C, ​4716 °F
• The liquid density is 6.99 g·cm−3
• The heat of fusion is 7.03 kJ·mol−1
• The heat of vaporization is 296.1 kJ·mol−1

Tin

• The molar heat capacity is 27.112 J·mol−1·K−1
• The electronegativity of Tin is1.96 on the pauling scale
• The Atomic radius is 140 pm
• The covalent radius 139±4 pm
• The Van der Waals radius is 217 pm

Tin

• Tin is a malleable element
• It is a ductile and highly crystalline silvery-white metal.
• Tin becomes a superconductor below 3.72 K
• The thermal expansion of Tin is 22.0 µm·m−1·K−1 (at 25 °C)
• The electrical resistivity at 0 °C is 115 nΩ·m

Tin

• On the Mohs hardness scale, tin is a 1.5
• Tin was one of the first superconductors to be studied
• Tin is the element with the greatest number of stable isotopes; 10 
• It was discovered around 3500 BC
• The crystal structure is diamond cubic and gray 

Thallium

• Tht symbol for thallium is Tl
• The atomic number is 81
• The atomic mass of thallium is 204.38
• Thallium is a post-transition metal
• 60–70% of thallium production is used in the electronics industry

Thallium

• The liquid density is 11.22 g·cm−3
• The molar heat capacity is 26.32 J·mol−1·K−1
• The heat of vaporization is 165 kJ·mol−1
• The heat of fusion is 4.14 kJ·mol−1
• The melting point of thallium is 577 K ​(304 °C, ​579 °F)

Thallium

• The boiling point of thallium is 1746 K ​(1473 °C, ​2683 °F)
• Thallium was discovered in 1861
• William Crookes and Claude-Auguste Lamy discovered thallium
• The atomic radius is empirical: 170 pm
• The covalent radius is 145±7 pm

Thallium

• Its crystal structure ​is hexagonal & close-packed
• Its electronegativity is 1.62 on the Pauling scale
• Thallium is a 1.2 on the Mohs hardness scale
• Thallium is found in the minerals crookesite,hutchinsonite, and lorandite
• It has a half-life of 73 years

Thallium

• Thallium tends to oxidize to the +3 and +1 oxidation states as ionic salts
• Thallium is a silvery white metal
• thallium is produced as a byproduct from refining of heavy metal sulfide ores.
• The radioisotope thallium-201 is used in small, nontoxic amounts
• Thallium is extremely soft, malleable and sectile enough to be cut with a knife at room temp 

Thallium

• Its electrical resistivity at 20 °C is 0.18 µΩ·m
• On the brinell hardness scale, it's a 26.4 MPa
• Thallium is a modestly abundant element in the Earth's crust
• Thallium can be obtained from the smelting of lead and zinc ores
• The annual worldwide production of thallium is about 10 metric tonnes

Maganese

• The symbol for maganese is Mn
• The atomic number is 25
• The atomic macc of Maganese is 54.938044
• Maganese is a trnasition metal
• At room temperature, Maganese is a solid

Maganese

• Maganese is silvery and metallic
• The melting point is1246 °C (​2275 °F)
• The boiling point is ​2061 °C (3742 °F)
• The heat of vaporization is 221 kJ·mol−1
• The heat of fusion is 12.91 kJ·mol−1

Maganese

• Its liquid density is 5.95 g·cm−3
• Its density is 7.21 g·cm−3
• Maganese is a 6 on the Mohs hardness scale
•  Manganese dioxide is used as the cathode material in zinc-carbon and alkaline batteries.

Maganese

• Maganese is paramagnetic
• Its thermal expansion is 21.7 µm·m−1·K−1 (at 25 °C)
• The thermal conductivity is 7.81 W·m−1·K−1
• Manganese compounds were used by Egyptian and Roman glassmakers
• manganese dioxide was available to alchemists and was used for experiments.

Maganese

• Spiegeleisen is an iron alloy with a manganese content of approximately 15%
• Manganese oxide dendrites on limestone from Solnhofen, Germany
• The most important manganese ore is pyrolusite (MnO2)
• Manganese is essential to iron and steel production by virtue of its sulfur-fixing
• Methylcyclopentadienyl manganese tricarbonyl is used as an additive in unleaded gasoline

That's what I learned about the elements!