sonya reads the element riddle below. i am shiny. i form +1 ions. there’s more! i am the most reactive metal…

sonya reads the element riddle below. i am shiny. i form +1 ions. there’s more! i am the most reactive metal in period 4. who am i? which element is the answer to the riddle? o krypton o potassium o sodium o bromine

sonya reads the element riddle below. i am shiny. i form +1 ions. there’s more! i am the most reactive metal in period 4. who am i? which element is the answer to the riddle? o krypton o potassium o sodium o bromine

Answer

Explanation:

Step1: Recall periodic - table trends

Metals are shiny and form positive ions. Reactivity of metals increases as we move left in a period.

Step2: Identify the period

We are looking at Period 4.

Step3: Determine the most reactive metal in Period 4

The most reactive metal in Period 4 is potassium (K), which forms + 1 ions ($K^+$).

Answer:

B. potassium