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Seniority rule heavily affects the selections of committee chairman in Congress. Those who have served on the committee for the longest uninterrupted time have a much higher chance of becoming chairman than others.
Answer:
Most sodium is obtained by electrolysis of molten mineral sodium chloride. Some are obtained from trona and soda ash. It occurs in many other minerals as well, including amphibole, zeolite and cryolite.
Explanation: