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प्रश्न
The electronic configuration of an element T is 2, 8, 8, 1.
What is the group number of T?
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उत्तर
Group 1 since the valence electron is 1.
संबंधित प्रश्न
How does the tendency of elements to gain electrons change as we move from left to right in a period? State the reason of this change.
Fill in the following blank with suitable word:
Group 18 elements are called ...............
State how the valency of elements varies in a period of the periodic table?
Give the chemical formula of sodium nitrate
State the number of elements in Period 1 of the Periodic Table.
Group 1 and 2 : s block : : group 13 and 18 : _______
The K and L shells of the elements Na and Mg contain electrons.
Write an Explanation.
Period
Position of A, B and C three elements is given in the table from the modern periodic table. Answer the following questions.
| Periods | Group 2 | Group 17 |
| 2 | ----- | A |
| 3 | B | ----- |
| 4 | ----- | C |
- What is A element metal or nonmetal?
- Which is the outermost orbit of element B?
- Identify C element and it's physical state.
Three elements A, B and C have 3, 4 and 2 electrons respectively in their outermost shell. Give the group number to which they belong in the Modern Periodic Table. Also, give their valencies.
