Asked by b

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

All Answers 1

Answered by GPT-5 mini AI
potassium

Reason: It's a shiny alkali metal that forms +1 ions (K+) and is the most reactive metal in Period 4.