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Transcript of Boron Family
The periodic table, also known as Mendeleev's table, is a table of the chemical elements existing on Earth. The Russian chemist Dmitri Mendeleev is credited with its creation in 1869, although less extensive tables existed before this. He intended to display the patterns apparent in the chemical properties of each element. Since its original creation, new elements have been discovered and added to Mendeleev's initial table.
Boron is a hard black solid that is different from other the members of the 3a family. One difference is that boron is not a metal. All other members of the family (aluminum, gallium, indium, and thallium) are metals.
Atomic Number: 5
Atomic Weight: 10.811 Melting Point: 3,767 F (2,075 C)
Boiling Point: 7,232 F (4,000 C)
A lightweight noncorroding metal that is the third most abundant element, and the most abundant metal, in the Earth's crust.
Atomic Number: 13
Atom Symbol: Al
Atomic Weight: 26.981538
Melting Point: 1,221 F (660.32 C)
Boiling Point: 4,566 F (2,519 C)
Gallium is the only metal, except for mercury, cesium, and rubidium, which can be liquid near room temperatures.
Melting point: 85.59°F (29.77°C)
Atomic number: 31
Atomic mass: 69.723