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प्रश्न
How do atomic structures (electron arrangements) change in a period with an increase in atomic numbers moving left to right?
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उत्तर
The size of atoms decreases when moving from left to right in a period. Thus, in a particular period, the alkali metal atoms are the largest and the halogen atoms are the smallest.
Li > Be > B > C > N > O > F
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संबंधित प्रश्न
What are the following group known as?
Group 18
Name and state the following with reference to the elements of the first three periods of the periodic table.
Noble gas with duplet arrangement of electrons.
Take any one alkali metal and write its reaction with (i)oxygen (ii)water (iii)acid.
Name the method by which alkali metals can be extracted.
How do alkaline earth metals occur in nature?
Write the electronic configuration of the first two alkaline earth metals.
How many electrons do inert gases have in their valence shells?
Write a short note on the following type of element –
halogens
Give a reason for the following:
Noble gases do not form compounds readily.
State the following:
The group from the groups 1 [IA], 2 [IIA], 16 [VIA] and 7 [VIIA] whose elements are most electronegative.
