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 most reactive metal in Period 4 that forms +1 ions and is shiny is potassium.

Step-by-step explanation:

The answer to the riddle is potassium. This element is shiny, forms +1 ions, and is indeed the most reactive metal in Period 4 of the periodic table. Potassium belongs to Group 1, which is also known as the alkali metals. These metals are characterized by having a single s electron in their outermost subshell, and they are highly reactive chemically. Potassium reacts vigorously with water and is more reactive than other alkali metals in Period 4, such as rubidium (Rb).

Answer 2

The most reactive metal in Period 4 that forms +1 ions and is shiny is potassium.

Step-by-step explanation:

The answer to the riddle is potassium. This element is shiny, forms +1 ions, and is indeed the most reactive metal in Period 4 of the periodic table. Potassium belongs to Group 1, which is also known as the alkali metals. These metals are characterized by having a single s electron in their outermost subshell, and they are highly reactive chemically. Potassium reacts vigorously with water and is more reactive than other alkali metals in Period 4, such as rubidium (Rb).