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प्रश्न
Select the correct answer from the options given below.
It is a metal in period 2 having electronic configuration 2, 1?
विकल्प
Beryllium
Lithium
Sodium
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उत्तर
Lithium
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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.
An element 'M' with electronic configuration (2, 8, 2) combines separately with (NO3)–, (SO4)2– and (PO4)3– radicals. Write the formula of the three compounds so formed. To which group and period of the Modern Periodic Table does the element 'M' belong? Will 'M' form covalent or ionic compounds? Give reason to justify your answer.
An element with the atomic number 19 will most likely combine chemically with the element whose atomic number is ______.
In terms of electronic configurations, explain the variation in the size of the atoms of the elements belonging to the same period and same group ?
The element which has the maximum number of valence electrons is:
(a) Na
(b) P
(c) Si
(d) A
In each of the following pair, choose the atom having the bigger size:
Na (At. No. 11) or K (At. No. 19)
Fill in the blank
There are ______ groups and ______ periods in the modern form of periodic table.
Fill in the blank
Oxidising property ________from fluroine to iodine because the power to accpet electron decreases.
What is meant by a group in the periodic table?
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.
