1.vertical columns in the periodic table indicate what information?
a. periods
b. liquids
c. synthetic elements
d. groups and families

2.which of these are families of elements?
a. metals and noble gases
b. shells and nonmetals
c. properties and rare earth elements
d. metalloids and atoms

3.why is the atomic mass of many elements not a whole number?
a. elements are unstable.
b. an element may have isotopes with different numbers of neutrons.
c. the atomic mass includes all the electrons.
d. lsotopes are always expressed in decimals.

Sure, i wish things had turned out differently for me in vietnam. but i know things could have turned out worse, too. so ljust try to be for what i do have and do my best to be independent. i can dress myself and even tie a tie. no more playing guitar, though. if i close my eyes, i can just about hear the music. just strumming my heartstrings is what i'm doing, i suppose. how could the author best resolve this situation to create a feeling of somber regret? a. the narrator describes the difficulty in cooking for himself. b. the narrator decides to sell his guitar and take up a new instrument. c. the narrator points out that he doesn't have to wear a tie too often. d.the narrator mentions a friend who did not live through the war.