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प्रश्न
Name or state following with reference to the element of the first three periods of the periodic table.
A non-metal in period 2 which is tetravalent.
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उत्तर
Tetravalent non-metal is carbon [C]
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संबंधित प्रश्न
Fill in the blank:
The formulae of chloride of metal M is MCl2. The metal M belongs to ……………. group.
Based on the group valency of elements state the formula lot the following giving justification for each :-
(i) Oxides of 1st group elements,
(ii) Halides of the elements of group 13, and
(iii) Compounds formed when an element of group 2 combines with, an element of group 16.
How do the valency and the atomic size of the elements vary while going from left to right along a period in the modern periodic table?
In each of the following pair, choose the atom having the bigger size:
Na (At. No. 11) or K (At. No. 19)
Why fluorine has higher E.N. than chorine?
Explain
Size of atom changes when it loses or gain electron
How many elements are there in period 2?
Choose the most appropriate answer from the following list of oxides which fit the description.
An amphoteric oxide: Al2O3 (shows both acidic and basic properties)
The elements of one short period of the periodic table are given below in order from left to right:
| Li | Be | B | C | O | F | Ne |
Which one of the above elements belongs to the halogen series?
Select the correct answer from the options given below.
It is a period having elements from atomic no. 11 to 18.
