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प्रश्न
Write the name from the description.
The period with electrons in the shells K, L, and M.
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उत्तर
The period with electrons in the shells K, L and M = 3 period
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संबंधित प्रश्न
Write the name from the description.
The family of metals having valency two.
Write the name from the description.
Nonmetals in the third period.
Write the name from the description.
Two elements having valency 4.
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 –
inner transition elements
Write a short note on the following type of element –
normal 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.
State whether true or false. If false, correct the statement.
Group 17 elements are named as Halogens.
Statement: Elements in a group generally possess similar properties but elements along a period have different properties.
Reason: The difference in electronic configuration makes the element differ in their chemical properties along a period.
f-block elements are also known as ______.
What are the s-block elements?
d-block elements are called transition elements.
Group 3-12 elements in the modern periodic table are called d block elements.
Assertion (A): Group 2 elements in the modem periodic table are called alkaline earth metals.
Reason (R): The oxides of group 2 elements produce alkaline solutions when they are dissolved in water.
Assertion (A): Noble gases are chemically inert in nature.
Reason (R): Noble gases have stable electronic structures.
Match the columns:
| Column ‘A’ | Column ‘B’ |
| Manganese | (a) Metal |
| (b) Non-metal | |
| (c) Transition metal |
