Question

1. potassium, magnesium, and iron are metals. which one would react most violently with water, and why? 3. arrange these in order of reactivity: zinc (zn), copper (cu), lead (pb), silver (ag). - are any of these in the same group on the periodic table? - why is copper less reactive than zinc? - which of these metals are found in the same period?

Explanation:

Step1: Recall metal - water reaction trends

Metals react with water based on their reactivity. Potassium is highly reactive due to its low ionization energy and single outer - shell electron.

Step2: Analyze metal reactivity

Potassium will react most violently with water among potassium, magnesium, and iron as it is higher in the activity series.

Step3: Consider periodic table groups

Zinc (Zn), Copper (Cu), Lead (Pb), and Silver (Ag) are not in the same group. They are transition metals.

Step4: Explain copper and zinc reactivity

Copper is less reactive than zinc because copper has a more stable electron configuration in its outermost shell, and it is more difficult to lose electrons compared to zinc.

Step5: Determine same - period metals

Zinc and copper are in the same period (Period 4) of the periodic table.

Step6: Arrange in reactivity order

Based on the metal activity series, the order of reactivity from most to least reactive is: Zinc > Lead > Copper > Silver.

Answer:

1. Potassium would react most violently with water because it is highly reactive due to its low ionization energy and single outer - shell electron.
2. Zinc and copper are in the same period (Period 4).
3. Copper is less reactive than zinc because of its more stable electron configuration.
4. The order of reactivity is Zinc (Zn) > Lead (Pb) > Copper (Cu) > Silver (Ag).
5. None of Zinc (Zn), Copper (Cu), Lead (Pb), Silver (Ag) are in the same group on the periodic table.