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प्रश्न
Name two properties of elements whose magnitudes change when going from top to bottom in a group of the periodic table. In what manner do they change?
उत्तर
On moving from top to bottom in a group , the size of the atoms and the metallic character of the elements increases.
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संबंधित प्रश्न
From the following elements :
4Be; 9F; 19K; 20Ca
(i) Select the element having one electron is the outermost shell.
(ii) two elements of the same group.
Write the formula of and mention the nature of the compound formed by the union of 19K and element X(2, 8, 7).
Fill in the blank in the following statement:
On going down in a group in the periodic table, the metallic character of elements ...............
Where would you locate the element with electronic configuration 2, 8 in the modern periodic table?
Which one of the following does not increase while moving down the group of the periodic table?
Name the element which has the electronic configuration 2, 8, 3?
F, Cl and Br are the elements each having seven valence electrons. Which of these (i) has the largest atomic radius, (ii) is most reactive? Justify your answer stating reason for each.
Taking into consideration the period of the elements given below, answer the following questions:
| Elements | Atomic Radius (pm) |
| O | 66 |
| B | 88 |
| C | 77 |
| N | 74 |
| Be | 111 |
| Li | 152 |
- Arrange the above elements in decreasing order of their atomic radii.
- State the period to which the above elements belong.
- Why this arrangement of elements is similar to the above period of modern periodic table?
- Which of the above elements have the biggest and the smallest atom?
- What is the periodic trend observed in the variation of atomic radius while going from left to right within a period?
What is the common feature of electronic configurations of the elements at the end of period 2 and period 3?
Choose the most appropriate answer from the following list of oxides which fit the description.
An amphoteric oxide: Al2O3 (shows both acidic and basic properties)
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?
