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Question
How do atomic structures (electron arrangements) change in a period with an increase in atomic numbers moving left to right?
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Solution
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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RELATED QUESTIONS
What are the following group known as?
Group 18
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Filling balloons
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Alkali metals and halogens do not occur free in nature.
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Group 1 [I – A] elements are called alkali metals.
