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प्रश्न
Write the name.
The atom having smallest atomic radius from group 1.
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उत्तर
Hydrogen (H)
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संबंधित प्रश्न
The element X forms a compound X2Y. Suggest an element that Y might be and give reasons for your choice.
An element A has an atomic number of 6. Another element B has 17 electrons in its one neutral atom.
(a) In which groups of the periodic table would you expect to find these elements?
(b) what type of bond is formed between A and B?
(c) Suggest a formula of the compound formed between A and B.
The following diagram shows a part of the periodic table containing first three periods in which five elements have been represented by the letters a, b, c, d and e (which are not their chemical symbols):
-
1 18 a 2 13 14 15 16 17 b c d e
(i) Select the letter which represents an alkali metal.
(ii) Select the letter which represents a nobles gas.
(iii) Select the letter which represents a halogen.
(iv) What type of bond is formed between a and e?
(v) What type of bond is formed between d and e?
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What was the basis of the earliest attempts made for classification and grouping of elements?
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Why was this basis of classification discarded for future classification of elements?
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Example for liquid metal is ______.
State whether true or false. If false, correct the statement.
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