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?

krypton
potassium
sodium
bromine

1 answer

The answer to the riddle is potassium.

Here's why:

  1. "I am shiny." – Potassium, like other metals, has a shiny appearance.
  2. "I form +1 ions." – Potassium typically loses one electron to form a +1 ion (K+).
  3. "I am the most reactive metal in Period 4." – Potassium (K) is indeed the most reactive metal in Period 4 of the periodic table.

Therefore, the correct answer is potassium.