Question

question 8 of 10 which of the following would be more reactive than magnesium a. beryllium (be) b. argon (ar) c. potassium (k) d. calcium (ca)

Explanation:

Reactivity in metals increases down a group and to the left in the periodic table. Magnesium (Mg) is in Group 2. Beryllium (Be) is above Mg in Group 2 and is less reactive. Argon (Ar) is a noble - gas and is very unreactive. Potassium (K) is in Group 1 and is more reactive than Mg as Group 1 metals are more reactive than Group 2 metals. Calcium (Ca) is below Mg in Group 2 and is more reactive than Mg, but potassium is more reactive than calcium due to its position in Group 1.

Answer:

C. Potassium (K)