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प्रश्न
Rewrite the following statement after correction, if necessary:
Groups have elements with consecutive atomic numbers.
उत्तर
Periods have elements with consecutive atomic numbers.
संबंधित प्रश्न
Why do we classify elements?
What is the need for classification of elements?
Write the name.
The atom having smallest atomic radius from group 1.
The basis of the classifications proposed by Dobereiner, Newlands and Mendeleev was ______.
Match the following
| 1. | Galvanisation | Noble gas elements |
| 2. | Calcination | Coating with Zn |
| 3. | Redox reaction | Silver-tin amalgam |
| 4. | Dental filling | Alumino thermic process |
| 5. | Group 18 elements | Heating in the absence of air |
Which one of the following statements is not correct about the trends in the properties of the elements of a group on going down in a group?
The atom of an element has electronic configuration 2, 8, 7. To which of the following elements would it be chemically similar?
In which group are inert elements placed?
The atomic number of an element 'X' is 11.
- Write the electronic configuration of X and find its valency.
- Write the formula and nature of its oxide.
Element 'X' forms an oxide with the formula X2O3 which is a solid with high melting point. ‘X’ would most likely be placed in the group of the Periodic Table as:
