ELI5: Explain Like I'm 5

Symmetry of diatomic molecules

Do you know what a diatomic molecule is? It’s like a pair of atoms that are joined together, kind of like if you and your best friend held hands and walked around. Some examples of diatomic molecules are oxygen gas (O2), nitrogen gas (N2), and hydrogen gas (H2).

Now, you know that some things can be the same on both sides, right? Just like when you draw a picture and fold it in half, and both sides look the same. This is called symmetry.

When we talk about the symmetry of diatomic molecules, we mean how the two atoms are arranged in relation to each other. Some diatomic molecules, like H2, are symmetrical because the two hydrogen atoms are the same size and shape, and they are joined together in the middle. This means that if you draw a line through the middle of the molecule, you’ll see that both sides look the same.

Other diatomic molecules, like CO (which has a carbon atom and an oxygen atom), are not symmetrical because the atoms are different sizes and shapes, and they are not joined together in the middle. If you draw a line through the middle of the molecule, you’ll see that both sides don’t look the same.

Scientists study the symmetry of diatomic molecules because it helps them understand how the molecules behave and how they interact with other things. It’s kind of like looking at a snowflake and noticing that it has symmetrical patterns – it helps us learn more about how the world works.