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प्रश्न
What are the periods in a periodic table? Give two characteristics of each.
उत्तर
Periods are the horizontal rows of elements in the periodic table.
Characteristics of periods:
1. Elements of the same period have the same number of shells.
2. The valency of elements in the same period changes, and therefore, the elements in a period exhibit different chemical properties.
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संबंधित प्रश्न
How many periods and groups are there in the long form of periodic table?
How were the positions of isotopes of an element decided in the modern periodic table?
On which side of the periodic table will you find non-metals?
What is the fundamental difference in the electron configurations between the group 1 and group 2 elements?
Answer the following in respect of element `31/15 P`
Give its electronic configuration
The horizontal rows in a periodic table are called _____.
Mendeleev's periodic table : atomic mass : : Modern periodic table : _______
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.
______ is the longest period in the periodical table.
On moving from left to right in a period in the periodic table, the size of the atom ______
