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प्रश्न
Name the type of elements which have two electrons in the outermost orbit.
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उत्तर
Alkaline Earth metals
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संबंधित प्रश्न
How does the metallic character of elements in Modern Periodic Table vary on moving from left to right in a period, and (ii) down a group?Give reason to justify your answer.
Give alongside is a part of the periodic table :
As we move horizontally from left to right:
| Li | Be | B | C | N | O | F | |
| Na | Mg | Al | Si | P | S | Cl |
(i) What happens to the metallic character of the elements?
(ii) What happens to the atomic size?
What happens to the number of valence electrons in the atoms of elements as we go down in a group of the periodic table?
Name two elements in each case:
Actinides
State the modern periodic law for the classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?
Give the symbol and valency of the following element and radical.
Nitrogen [Nitride]
Give the chemical formula of sodium sulphite
What are the elements.
The longest period of the Modern Periodic Table is period.
An element has the atomic number 12.
- Write the electric configuration.
- To which group and period does it belong.
