When two or more atoms chemically bond together, they form a molecule. Sometimes the atoms are all from the same element. For example, when three oxygen atoms bond together, they form a molecule of ozone (O3). If a molecule forms from atoms of two or more different elements, we call it a compound.
How do atoms join together?
Atoms come together to form molecules because of their electrons. ... When two atoms share electrons between them, they are locked together (bonded) by that sharing. These are called covalent bonds. Bonds like this are in oxygen gas, nitrogen gas, and hydrogen gas.
What happens when to atoms combine?
When atoms combine, they share their outermost electrons to create more sustainable energy states. This sharing bonds the atoms into an ionic structure or a molecule.
