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 swans in Yeats’s “The Wild Swans at Coole” symbolize the speaker’s youth.
Explanation:
I believe the answer is B.
Let's look at it with punctuation: My father, an expert in the field of astronomy, recently discovered a comet.
After reading it makes more sense to have the pauses. Hopefully that helps.
Metaphor because you didn’t use like or as! :)
