Question

based on its location on the periodic table, which metal is likely to be less reactive than rubidium reactive than calcium? potassium (k) cesium (cs) magnesium (mg) titanium (ti)

Explanation:

• Reactivity of metals in the periodic table:
• For alkali metals (Group 1), reactivity increases down the group. Rubidium (Rb) is more reactive than potassium (K), and cesium (Cs) is more reactive than rubidium.
• For alkaline - earth metals (Group 2), reactivity increases down the group. Calcium (Ca) is more reactive than magnesium (Mg).
• Titanium (Ti) is a transition metal. Transition metals generally have lower reactivity compared to alkali and alkaline - earth metals. But when comparing with the given alkali and alkaline - earth metal options, we use the group - based reactivity trends.
• Since we are comparing with rubidium (Group 1) and calcium (Group 2), and we know that within Group 2 (alkaline - earth metals), magnesium (Mg) is above calcium (Ca), so Mg is less reactive than Ca. And among the given options, magnesium (Mg) is the one that can be compared using the main - group (Group 2) reactivity trend (reactivity increases down the group in Group 2).

Answer:

C. magnesium (Mg)