Answer:
"The elements are arranged in seven horizontal rows,called periods or series,and 18 vertical columns,called Groups."
Explanation:
Risk*
<span>If the concentration of H⁺ ions will decrease then the concentration of OH⁺ ions will increase.</span>
D. All of the above. Developing medicine, analyzing compounds and producing new product such as plastic all have to deal with chemistry.
<span>11.2G is the answer to this problem.
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