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प्रश्न
An element A has 2 electrons in its fourth shell. State its electronic configuration.
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उत्तर
Its electronic configuration is 1s22s22p63s23p64s2.
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संबंधित प्रश्न
where should hydrogen be placed in the modern periodic table? Give reason for your answer.
An element E has following electronic configuration:
|
K |
L |
M |
|
2 |
8 |
6 |
(a) To which group of the periodic table does element E belong?
(b) To which period of the periodic table does element E belong?
(c) State the number of valence electrons present in element E.
(d) State the valency of the element E.
State the modern periodic law.
Give the symbol and valency of the following element and radical.
Sulphate
State the number of elements in Period 1 of the Periodic Table.
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.
Noble gases belong to______ group of the periodic table.
How does the property vary in periods and in groups?
The inert gas which lies in the third period is ______
Spot the error:
The elements of group 13 are called the carbon family.
