ELI5: Explain Like I'm 5

Alkali metal

Okay kiddo, let's talk about alkali metals! Alkali metals are a special group of elements on the periodic table. They are called "alkali" because when they mix with water, they make an alkaline solution, which is like the opposite of acidic.

There are six alkali metals: lithium, sodium, potassium, rubidium, cesium, and francium. They are all shiny metals and can be found easily in nature.

One of the coolest things about alkali metals is that they are really good at giving away electrons. Remember how atoms have protons, neutrons, and electrons? Well, alkali metals have only one electron in their outermost shell, which is called the valence electron. And they really want to get rid of that one electron because it makes their outer shell complete. So whenever they come into contact with something that wants an electron, like water or another element, they give it away really easily.

Another thing you should know about alkali metals is that they are extremely reactive. Remember how I said they like to give away electrons? Well, that means they don't like to hang out with themselves for too long. They would much rather give their electrons to other elements and form compounds. This means that they can be dangerous to handle and can catch fire or explode if they come into contact with water or air.

But don't worry, kiddo, you won't be handling alkali metals anytime soon. Just remember that they are special elements on the periodic table that are really good at giving away electrons, and that they are very reactive and can be dangerous if not handled properly.