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प्रश्न
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The family of metals having valency one.
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उत्तर
The family of metals having valency one = Alkali metals
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संबंधित प्रश्न
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The period with electrons in the shells K, L, and M.
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The group with valency zero.
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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.
Non-metals in the third period.
What is the main characteristic of the last elements in the periods of a periodic table? What is the general name of such elements?
Write a short note on the following type of element –
inner transition elements
State whether true or false. If false, correct the statement.
Group 17 elements are named as Halogens.
If the electronic configuration of an element is 1s2 2s2 2p6 3s2 3p1’then it will
occupy ______ block of the periodic table.
______ block element is placed at the bottom of the periodic table.
What are the s-block elements?
Group 1 (except hydrogen) elements are called alkali metals.
Group 3-12 elements in the modern periodic table are called d block elements.
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?
Answer the following questions related to the modern periodic table.
How are elements placed around the zig-zag line in the p-block of the periodic table?
