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प्रश्न
What do you understand by typical elements?
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उत्तर
The third period elements, Na, Mg, Al, Si, P and Cl summarize the properties of their respective groups and are called typical elements.
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संबंधित प्रश्न
Consider the following elements:
Ca, Cl, Na, I, Li, Ba, Sr, K, Br
Separate these elements into three groups (families) of similar properties. State one property in each case on the basis of which you have made your choice.
State the term
The tabular arrangement of elements in horizontal rows and vertical columns _________
Name an alkali metal in period 3 and halogen in period 2.
Write a short note.
Position of isotopes in the Mendeleev’s and the modern periodic table.
State the modern periodic law.
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 A element metal or nonmetal?
- Which is the outermost orbit of element B?
- Identify C element and it's physical state.
An element has the atomic number 12.
- Write the electric configuration.
- To which group and period does it belong.
Explain giving reason why although the nuclear charge in atoms increases in moving from left to right in a period as well as in moving from top to bottom in a group in the Modern periodic table, but the size of the atoms does not vary similarly in both situations.
An element with atomic number ______ will form a basic oxide.
