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प्रश्न
What are groups and periods in the modern periodic table?
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उत्तर
- The horizontal rows are called periods. There are seven periods in the periodic table.
- Vertical columns in the periodic table starting from top to bottom are called groups. There are 18 groups in the periodic table.
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संबंधित प्रश्न
How does the electronic configuration of an atom relate to its position in the Modern Periodic Table?
Fill in the following blank with suitable word:
Group 18 elements are called ...............
How does the chemical reactivity of the halogens vary on going in group 17 of the periodic table?
How will the tendency to gain electrons change as we go from left to right across a period? Why?
What is meant in the periodic table by a period?
Give the symbol and valency of the following element and radical.
Potassium
Mendeleev's periodic table : atomic mass : : Modern periodic table : _______
Distinguish between:
Group 17 - Group 18
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.
Which one of the following elements exhibit maximum number of valence electrons?
