question arrange the metallic elements in order of increasing reactivity. use the periodic table to identify…

question arrange the metallic elements in order of increasing reactivity. use the periodic table to identify their positions on the table. drag each tile to the correct box. tiles rubidium magnesium potassium calcium sequence

question arrange the metallic elements in order of increasing reactivity. use the periodic table to identify their positions on the table. drag each tile to the correct box. tiles rubidium magnesium potassium calcium sequence

Answer

Answer:

magnesium < calcium < potassium < rubidium

Explanation:

Step1: Recall periodic - table trends

Metallic reactivity increases down a group and decreases across a period from left to right.

Step2: Locate elements in periodic table

Magnesium (Mg) is in Group 2, Period 3. Calcium (Ca) is in Group 2, Period 4. Potassium (K) is in Group 1, Period 4. Rubidium (Rb) is in Group 1, Period 5.

Step3: Compare reactivity

Since Mg and Ca are in the same group (Group 2) and Ca is below Mg, Ca is more reactive than Mg. K and Rb are in Group 1. Rb is below K, so Rb is more reactive than K. Also, Group 1 elements are more reactive than Group 2 elements in the same period. So, the order of increasing reactivity is magnesium < calcium < potassium < rubidium.