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प्रश्न
State the following:
The group which contains highly electropositive metals including sodium.
उत्तर
1 [I – A] group contains highly electropositive metals.
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संबंधित प्रश्न
The electrons in the atoms of four elements A, B, C and D are distributed in three shells having 1, 3, 5 and 7 electrons in the outermost shell respectively. State the period in which these elements can be placed in the modern periodic table. Write the electronic configuration of the atoms of A and D and the molecular formula of the compound formed when A and D combine.
An element A has atomic number 14. To which period does this element belong and how many elements are there in this period.
Name the element in period 3 which does not form oxide.
First ionization enthalpy of two elements X and Y are 500 KJ mol-1 and 375 KJ mol-1 respectively. Comment about their relative position in a group as well as in a period.
An element 'M' has atomic number 11.
(a) Write its electronic configuration.
(b) State the group to which 'M' belongs.
(c) Is 'M' a metal or a non-metal.
(d) Write the formula of its chloride.
Select the correct answer
Number of shells in potassium are
Copy and complete the following sentence choosing the correct word or words from those given below, at the end of the sentence:
The similarities in the properties of elements belonging to a group are because they have the same ______
Choose the word or phrase from the bracket which correctly complete each of the following statement:
Metals are good ................. (oxidising agents/reducing agents) because they are electron ............. (acceptors/donors).
An element belongs to the third period and Group IIIA (13) of the periodic table. State: the valency,
Name or state following with reference to the element of the first three periods of the periodic table.
The valency of elements in group 1 [I–A].
