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प्रश्न
An element belongs to the third period and Group IIIA (13) of the periodic table. State: the valency,
उत्तर
The valency is +3.
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संबंधित प्रश्न
An element 'X' has mass number 35 and number of neutrons 18. Write atomic number and electronic configuration of 'X'. Also write group number, period number and valency of 'X'.
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(a) increases
(b) decreases
(c) remain the same
(d) first increases then decreases
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Which of these have physical and chemical properties resembling chlorine.
How can the valency of an element be determined if its electronic configuration is known?
In the above table, H does not represent hydrogen.Some elements are given in their own symbol and position in the periodic table while others are shown with a letter. With refrence to the table answer the following questions.
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2. Identify the most reactive element of Group I.
3. Identify the element from Period 3 with least atomic size.
4. How many valence electrons are present in Q?
5. Which element from group 2 would have the least ionisation energy?
6. Identify the noble gas of the fourth period.
7. In the compound between A and H, what type of bond would be formed and give its molecular formula.
Name and state the following with reference to the elements of the first three periods of the periodic table.
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