What are eka- boron, eka-aluminium and eka- silicon?

Answer:

Mendeleev name unnamed elements as EKA- Boron EKA- Aluminium and EKA Silicon which were later replaced as Scandium, Gallium, and germanium respectively.

• Eka boron – It is The element Scandium.
• Eka aluminum is the element Gallium.
• Eka silicon – It is the element Germanium.

Scandium(Eka boron)

Scandium(Sc) is an element with the atomic number 21 in the periodic table. Scandium is mined from one of the rare minerals from Scandinavia. The colour it develops when exposed to air is yellowish or pinkish cast.

• The characteristics of Scandium is it gets tarnished and burned easily if ignited.
• It also reacts with hydrogen gas and will dissolve in acids.

Gallium(Eka aluminum)

Gallium(Ga) is a chemical element with atomic number 31. The Solid gallium is of blue-gray metal having orthorhombic crystalline structure whereas a very pure gallium is coated with stunning silvery color.

• It does not exist in pure form in nature, and its compounds do not act as a primary source of extraction.
• When Gallium is added to certain metals it causes them to become brittle.
• Gallium has one of the largest ranges in which it is a liquid when compared to other metals.

Germanium (Eka silicon)

Germanium(Ge) is a chemical element places between silicon and tin in Group 14 of the periodic table.
A hard, grey-white, lustrous and brittle metalloid acts in properties between metals and nonmetals.

• Germanium has a diamond-like structure and its properties are very similar to the physical and chemical properties of silicon.
• It is stable in air and water and does not get affected by alkalis and acids except nitric acid.

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