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प्रश्न
Write the name from the description.
The group with valency zero.
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उत्तर
The group with valency zero = Group 18 noble elements
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संबंधित प्रश्न
Write the name from the description.
The period with electrons in the shells K, L, and M.
Write the name from the description.
The family of metals having valency one.
Write the name from the description.
The family of metals having valency two.
Write the names from the description.
The metalloids in the second and third periods.
Write the names from the description.
Two elements having valency 4.
What is the main characteristic of the last elements in the periods of a periodic table? What is the general name of such elements?
Match column A with column B.
|
Column A |
Column B |
|
(a) Element short by 1 electron in octet |
(i) Transition elements |
|
(b) Highly reactive metals |
(ii) Noble gases |
|
(c) Non-reactive elements |
(iii) Alkali metals |
|
(d) Elements of groups 3 to 12 |
(iv) Alkaline earth metals |
|
(e) Radioactive elements |
(v) Halogens |
|
(f) Elements with 2 electrons in the outermost orbit |
(vi)Actinides |
Write a short note on the following type of element –
transition elements
Name or state following with reference to the element of the first three periods of the periodic table.
The periods which contain the inner transition elements.
d-block elements are otherwise known as ______.
If the electronic configuration of an element is 1s2 2s2 2p6 3s2 3p1’then it will
occupy ______ block of the periodic table.
d-block elements are called transition elements.
Group 3-12 elements in the modern periodic table are called d block elements.
Assertion (A): Noble gases are chemically inert in nature.
Reason (R): Noble gases have stable electronic structures.
Write the answer to the questions with reference to the periodic table.
- What do (A), (B), (C), and (D) represent? [1]
- Elements are arranged in increasing order of their ______. [1]
- Write the electronic configuration of the first four elements in Group I. [1]
- What change in atomic radius is observed in moving from left to right in a Period? [1]
- Give a reason for (d). [1]
Match the columns:
| Column ‘A’ | Column ‘B’ |
| Manganese | (a) Metal |
| (b) Non-metal | |
| (c) Transition metal |
Answer the following questions related to the modern periodic table.
Name the blocks with the groups that they consist of.
Answer the following questions related to the modern periodic table.
Which block elements are known as transition elements?
