Consider the following elements
Na, Ca, Al, K, Mg, Li
(a) Which of these elements belong to the same period of the periodic table?
(b) Which of these elements belong to the same group of the periodic table?
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Answer:
a)li, 2nd period
na,mg,al, 3rd period
k,mg, 4th period
b)li,na,k. 1st
mg,ca. 2nd
al. 3rd
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