Question

Which element in each pair is more reactive? O or S Be or Ca Na or Mg Li or Rb a) O, Ca, Na, Rb b) S, Ca, Mg, Li c) O, Be, Mg, Rb d) S, Ca, Na, Li

Answer 1

The more reactive of each pair is O (Oxygen), Ca (Calcium), Na (Sodium), and Rb (Rubidium). Reactivity increases up a Group for nonmetals and down a Group for metals in the periodic table.

Step-by-step explanation:

In comparing reactivity of the pairs, you should know that reactivity in nonmetals such as O (Oxygen) and S (Sulphur), increases as you move up the Group, hence O is more reactive than S. In the case of metals like Be (Beryllium) and Ca (Calcium), Na (Sodium), and Mg (Magnesium), and Li (Lithium) and Rb (Rubidium), reactivity increases as you move down Group 1 and Group 2. Therefore, Ca is more reactive than Be, Na is more reactive than Mg, and Rb is more reactive than Li.

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