The correct answers to the following questions are :
(1) Vertical columns in the periodic table indicate D.groups and families
(2) families of elements includes A.metals and noble gases
(3) <span>the atomic mass of many elements not a whole number because </span>B.An element may have isotopes with different numbers of neutrons.
Answer:
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If you ever stumble into quicksand, there's one word to keep in mind.
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The word Tool could be one.
Answer:
I am literally stuck on the same question and cant seem to figure it out but I think it is either a or b
Explanation:
