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प्रश्न
An element has 2 electrons in its N shell.
State its position in periodic table.
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उत्तर
Electronic configuration of the element is:
| K | L | M | N |
| 2 | 8 | 8 | 2 |
∴ Position in the periodic table is the 4th period. (Four shells).
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संबंधित प्रश्न
Which element has the electronic configuration 2, 8, 2?
How would the tendency to gain electrons change on moving from left to right in a period of the periodic table?
Explain why All the elements of a period have different chemical properties.
What happens to the number of valence electrons in the atoms of elements as we go down in a group of the periodic table?
What is a group in the periodic table?
Define:
Periodic table
How many groups and periods does the modern periodic table have?
Two elements P and Q belong to the same period of the modern periodic table and are in group 1 and group 2, respectively. Compare the following characteristics in the tabular form.
- Number of electrons in their atoms
- Their tendency to lose electrons
- Their metallic characters
- Formation of their oxides
- Formulae of their chlorides
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:
A and F
1H2 is an isotope of hydrogen. In the modern Periodic Table it will ______.
