Why do potassium sodium and lithium are placed in one group
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3
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They all belong to first group of periodic table, they have 1 electron in their outermost shell and have a tendency to lose 1 electron to acquire noble gas configuration and gain +1 charge. The name of this group is alkali metals as they are soluble in water.
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1
Answer:
Because, they have same configuration,and same chemical and physical properties
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