Advertisements
Advertisements
प्रश्न
How do the properties of eka-aluminium element predicted by Mendeleev compare with the actual properties of gallium element?
उत्तर
The properties of eka-alumiunium, predicted by Mendeleev, which was undiscovered then, were almost similar to the actual properties of the element discovered later on. The comparison table below shows the similarities in the properties of the undiscovered element then and the actual element (Gallium).
| Property | Eka-Aluminium | Gallium |
| Atomic Mass | 68 | 69.7 |
| Density | 5.9g/cm3 | 5.94g/cm3 |
| Melting point | low | 30.2oC (low) |
| Formula of oxide | Ea2O3 | Ga2O3 |
| Formula of chloride | EaCl3 | GaCl3 |
APPEARS IN
संबंधित प्रश्न
What property do all elements in the same column of the Periodic Table as fluorine have in common?
What was the Mendeleev's basis for the classification of elements?
Name two elements whose properties were predicted on the basis fo their positions in Mendeleev's periodic table.
What name were given by Mendeleev to the then undiscovered element gallium?
What name were given by Mendeleev to the then undiscovered element germanium?
The elements from the zero group are called _______.
Eka boron : Scandium : : Eka Aluminum : _______
Find the odd one out and give its explanation.
Write the name.
The family of elements having zero valency.
Write scientific reason.
In a group, the size of the atom increases as it goes down from the top.
