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प्रश्न
What is meant in the periodic table by a group?
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उत्तर
Vertical columns in a periodic table that have the same number of valence electrons and similar chemical properties are called a group.
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संबंधित प्रश्न
What happens to the number of valence electrons in atoms of elements as we go down a group of the periodic table?
Name and state the following with reference to the elements of the first three periods of the periodic table.
Group whose elements have zero valencies.
Take any one alkali metal and write its reaction with (i)oxygen (ii)water (iii)acid.
Write the reactions of the first three alkaline earth metals with dilute hydrochloric acid.
How many electrons do inert gases have in their valence shells?
Comment on the (i) reactivity (ii) colour (iii) physical state of group 17 elements.
Name the gas used in:
Light bulbs
Give reason:
Alkali metals are kept in an inert solvent.
State the characteristics which remain similar in moving down in a group of the periodic table.
State the main helpful features of the long form of the periodic table.
