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Q7: Which functional group can be indicated as
Q14: Which of the following refers to a
Q18: Which of the following compounds is NOT
Q25: Perhaps the greatest triumph of Mendeleev's periodic
Q37: The density of lead is 11.3 g/cm<sup>3</sup>.
Q49: When an electron in an excited atom
Q100: Acetylene is used in high temperature metal
Q133: Which is the electron dot structure of
Q165: Archaeological evidence indicates that ancient Egyptians were
Q187: Oxygen forms monatomic ions with a charge