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number 19 on the periodic table is green which statement best describes the element (A, the element is in group 4) ( b,the element is in group 4it’s valence is 4it’s valence is 4) (c, the element is in period number 1the element is in period number 1) (d, the element is in group 1a and has 1 valence electronic)

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Answer: D.

Explanation: Atomic number 19 is potassium (K). Potassium is an alkali metal in group 1 (often labeled 1A) and has one valence electron (electron configuration [Ar] 4s1). It lies in period 4, not period 1 or group 4.