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प्रश्न
Explain why all the elements of a period have different chemical properties.
State the reason for the following observation:
All the elements in a period have different chemical properties.
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उत्तर
All the elements of a period have different chemical properties because the number of valence electrons for each varies.
संबंधित प्रश्न
In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38. Which of these have physical and chemical properties resembling calcium?
Give two example of group 1 elements.
Name the scientist who prepared modern periodic table.
What are the groups in a periodic table? Give two characteristics of each.
Define:
Periodic table
Name two elements in Alkali metals.
Give the symbol and valency of the following element and radical.
Hydrogen
Give the chemical formula of sodium sulphite
What are the periods in a periodic table?
A part of modern periodic table is given below. On its basis, answer the following questions:
| Group No. → | 1 | 2 | 13 | 14 | 15 | 16 | 17 | 18 |
| Period ↓ | ||||||||
| 2 | A | B | ||||||
| 3 | E | D | F | C |
Which of the element is a Metalloid?
