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प्रश्न
Write the number of vertical columns in the modern periodic table. What are these columns called?
उत्तर
There are 18 vertical columns in the modern periodic table and these are known as groups.
संबंधित प्रश्न
Study the following table in which positions of six elements A, B, C, D, E and F are shown as they are in the modern periodic table:
|
Group→
Period↓ |
1
|
2
|
3-12
|
13
|
14
|
15
|
16
|
17
|
18
|
| 2 | A | B | C | ||||||
| 3 | D | E | F |
On the basis of the above table, answer the following questions:-
(i) Name the element which forms only covalent compounds.
(ii) Name the element which is a metal with valency three.
(iii) Name the element which is a non-metal with valency three.
(iv) Out of D and E, which is bigger in size and why?
(v) Write the common name for the family to which the elements C and F belong.
Rewrite the following statement after correction, if necessary:
The metallic character of elements in a period increases gradually on moving from left to right.
In which part of a group would you separately expect the elements to have the largest atomic size?
How do the following change on moving from left to right in a period of the periodic table?
Give examples in support of your answer.
atomic structure (electron arrangements) ?
What is the common feature of the electronic configuration of the elements at the end of period 2, and period 3?
Choose the correct answer from the choice given:
An element A belonging to Period 3 and Group II will have
An element belongs to the third period and Group IIIA (13) of the periodic table. State: the valency,
Fill in the blank and rewrite the completed statement:
________ group in the periodic table contains elements that are all gases at room temperature.
Select the correct answer from the options given below.
Is the group number of the element whose atomic number is 4.
