Question

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

Answer 1

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**.