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प्रश्न
Name and state the following with reference to the elements of the first three periods of the periodic table.
Metalloid in Period 3.
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उत्तर
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संबंधित प्रश्न
Write the number of periods the Modern Periodic Table has. State the changes in valency and metallic character of elements as we move from left to right in a period. Also state the changes, if any, in the valency and atomic size of elements as we move down a group.
Name the element which is in seventeenth group and second period.
Arrange the following elements in the increasing order of their metallic character:
Mg, Ca, K, Ga
Name the non-metals present in period 2 and metals in period 3.
Name the element in period 3 which does not form oxide.
Select the correct answer
Number of shells in potassium are
The elements of one short period of the periodic table are given below in order from left to right:
| Li | Be | B | C | O | F | Ne |
One element of this period is missing. Which is the missing element and where should it be placed?
State the property trends in general of elements on moving from left to right in a period of the periodic table.
Name or state following with reference to the element of the first three periods of the periodic table.
A metal in period 3 having valency 3.
Complete the table pertaining to the following elements given in Column I.
| Column I Elements | Atomic Number | Electronic Configuration | Underline the element present in that group |
| 1. Hydrogen | 1 | ______ | Be/Na/Ca |
| 2. Carbon | 6 | ______, ______ | N/P/Si |
| 3. Nitrogen | 7 | _______, ______ | C/P/S |
| 4. Oxygen | 8 | _______, ______ | N/S/Cl |
| 5. Sulphur | 16 | _____, ______, _______ | O/N/F |
| 6. Chlorine | 17 | _____, ______, ______ | I/O/S |
