교과서 질문
Assume that the mixture of substances in drawing (a) undergoes a reaction. Which of the drawings (b)–(d) rep-resents a product mixture consistent with the law of mass conservation?
(b)
(c)
(d)
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검증된 단계별 안내
Identify the three elements indicated on the periodic table, and give the group that they are in.
Which of the following three drawings represents a neutral Na atom? (a) (b) (c)
Would you expect these elements to have similar or different chemical reactivity?
Classify these elements as metals, nonmetals, or semimetals.