Which pair of substances would most likely result in the production of a gas when reacting with an acid?
O litmus and methyl orange
O base and salt
metal and carbonate
O carbon dioxide and water

Metal and carbonate

Explanation:

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periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

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