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प्रश्न
Among the given species A–, A+, and A, the smallest one in size is ______.
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उत्तर
Among the given species A–, A+, and A, the smallest one in size is A+.
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संबंधित प्रश्न
The element which can from an acidic oxide should be the one whose atomic number is:
(a) 6
(b) 16
(c) 12
(d) 19
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?
A non-metal X which is the largest constituent of air combines with hydrogen when heated in the presence of iron as catalyst to form a gas Y. When gas Y is treated with sulphuric acid, it forms a compound Z which is used as a chemical fertiliser.
(a) What are X, Y and Z?
(b) To which group of periodic table does X belong?
(c) Name the periodic table in which X is placed.
(d) Which element is placed just before X in the period?
(e) Which element is placed just after X in the period?
Answer the following question.
Write the name, symbol, and electronic configuration of an element X whose atomic number is 11.
Why was this basis of classification discarded for future classification of elements?
Elements belonging to the same group have the same valency.
The basis of the classifications proposed by Dobereiner, Newlands and Mendeleev was ______.
______ group contains the member of the halogen family.
Which of the following hydroxides is most basic?
Which of the following property will be common in group 1 elements?
