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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
What is the name of those elements which divide metals and non-metals in the periodic table?
The modern periodic table was prepared by ______.
Consider the following elements:
20Ca, 8O, 18Ar, 16S, 4Be, 2He
Which of the above elements would you expect to be:
(i) very stable?
(ii) in group 2 of the periodic table?
(iii) in group 16 of the periodic table?
State its position in the periodic table?
Give the symbol and valency of the following element and radical.
Potassium
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 an element metal or nonmetal?
- Which is the outermost orbit of element B?
- Identify C element and it's physical state.
______ and ______ are called inner transition elements.
The longest period of the Modern Periodic Table is period.
Give the criteria on the basis of which elements are placed (i) in a group and (ii) in a period in the modern periodic table. The atomic number of an element is 16. According to the criteria, in which group and period it should be placed?
An element has 2 electrons in its N shell.
Is it a metal or a non-metal?
