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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:
the must valuable experience.i got in my year of studing in high school is being trusted to represent my school in serval compitions. my school had trusted me to represent them in over five compitions . I should represent my class for being sucess.
It describes what the narrator knows from his past.
The narrator describes the demeanor of his childhood friend in the past. The narrator does not know how his childhood friend is in present time, so he uses what he knows from the past for comparison throughout the story. Until of course they finally reunite.
The answer is A fragments don't make sense if you read them by themselves
