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- Eka-aluminium and Eka-silicon are respectively known as:Option: 1 Aluminium and siliconOption: 2</stron
- #Chemistry
- #Classification of Elements and Periodic table
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Eka-aluminium and Eka-silicon are respectively known as:
Aluminium and silicon
Silicon and aluminium
Gallium and germanium
Gallium and Tin
Answers (1)
Mendeleev’s Periodic table -
Merits or advantages of Mendeleef's periodic table :
- Study of elements : First time all known elements were classified in groups according to their similar properties. So study of the properties of elements become easier .
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Prediction of new elements : It gave encouragement to the discovery of new elements as some gaps were left in it.
Sc (Scandium) Ga (Gallium) Ge (Germanium) Tc (Technetium)
These were the elements for whom position and properties were well defined by Mendeleev even before their discoveries and he left the blank spaces for them in his table.
Ex. Blank space at atomic weight 72 in silicon group was called Eka silicon (means properties like silicon) and element discovered later was named Germanium.
Similarly other elements discovered after mendeleev periodic table were.
Eka aluminium – Gallium(Ga) Eka Boron – Scandium (Sc)
Eka Silicon – Germanium (Ge) Eka Manganese – Technetium (Tc)
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According to Mendeleev’s periodic table, Eka-aluminium is known as gallium and Eka-silicon is known as germanium.
Therefore, Option(3) is correct
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