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प्रश्न
What are the merits of the modern periodic table of elements?
उत्तर
The merits of the Modern Periodic Table of Elements are as follows:
1. It is based on the atomic number of elements.
2. The modern periodic table clearly explains the reason behind elements showing similar properties in a group and dissimilar properties in different groups.
3. This also explains the reason for the periodicity in the properties of elements.
4. The modern periodic table explains the reason for a repetition in the properties of elements after 2,8,18 and 32 elements.
5. In the modern periodic table, there are no anomalies in the arrangement of elements.
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संबंधित प्रश्न
How many periods and groups are there in the long form of periodic table?
Which element has the electronic configuration 2, 8, 2?
Write a short note.
Structure of the modern periodic table.
Give the symbol and valency of the following element and radical.
Sodium
Give the symbol and valency of the following element and radical.
Sulphur [Sulphide]
The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
The inert gas which lies in the third period is ______
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 |
Write the molecular formula of the compound formed by the combination:
E and B
- Write the electronic configuration of element X, given by its symbol as under: \[\ce{^40_20 X}\]
- Determine its position in the modem periodic table.
- What is the nature of its oxide?
- Name one other element of its group.
Answer the following in respect of element \[\ce{_16^32S}\].
Give its formula with hydrogen.
