Video narration
Have you ever rebuilt the same building blocks into a different shape? Imagine that with atoms: during a chemical change, they don't disappear. They are rearranged. A chemical bond is the attraction that holds atoms together-like the way blocks stay connected in a model. Before a reaction, the atoms are joined in one arrangement. Then some bonds break, and new bonds form. The same atoms end up joined differently, making a different substance. So the atoms do not turn into different atoms. What changes is how their bonds arrange them. But the block model has a limit: blocks use plastic clips, while a chemical bond isn't a tiny connector. It's an attraction between atoms. So when you ask what changes in a chemical change, it's not simply how things look. The same atoms are rebuilt into new combinations-like your blocks, but without clips.