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An element that is a very reactive metal could have an atomic number of(1) 9 (2) 2(3) 19 (4) 79

NY Regents Chemistry Exam August 2023 Question 4


4  An element that is a very reactive metal could have an atomic number of

(1) 9

(2) 2

(3) 19

(4) 79


Solution: Very reactive metals are located in Group 1 on the Periodic Table. Atomic number is shown as the bold number below each element. Potassium (K) is a metal in Group 1 with an atomic number of 19 (Choice 3)

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