Advertisements
Advertisements
प्रश्न
What was the Mendeleev's basis for the classification of elements?
उत्तर १
The atomic mass was Mendeleev's basis for the classification of elements.
उत्तर २
The atomic mass was Mendeleev's basis for the classification of elements.
APPEARS IN
संबंधित प्रश्न
Besides gallium, which other elements have since been discovered that were left by Mendeleev in his Periodic Table? (any two)
How could the Modern Periodic Table remove various anomalies of Mendeleev’s Periodic Table?
Which of the following statements is not a correct statement about the trends when going from left to right across the periods of periodic Table.
An atom has electronic configurations 2, 8, 7.
What is the atomic number of this element?
Which group of elements could be placed in Mendeleev's periodic table later on, without disturbing the order? Give reason.
Why did Mendeleev leave some gaps in his periodic table?
Which group of elements was missing from Mendeleev's original periodic table?
Why could no fixed position be given to hydrogen in Mendeleev's periodic table?
Match the columns.
| Column A | Column B |
| 1) Eka-aluminium | a) Scandium |
| 2) Eka-Silicon | b) Gallium |
| 3) Eka- boron | c) Germanium |
| d) Beryllium |
Match the column:
| Column ‘A’ | Column ‘B’ |
| Alkali metals | (a) Group 18 |
| Halogens | (b) Group 1 |
| Noble gases | (c) Group 17 |
