Atoms are actually mostly empty space. The nucleus of an atom is very tiny compared to the size of the atom itself, and the electrons are even smaller.
If you could magnify an atom to the size of a football stadium, the nucleus would be like a grain of sand in the middle, and the electrons would be like tiny specks flying around in the stands.
The rest would be just empty space.
So, if atoms are mostly empty space, how can they form solid objects?
The answer is that atoms are held together by different types of forces, such as electromagnetic force and nuclear force.
These forces create bonds between atoms that make them stick together and form molecules.
Molecules can then form different types of matter depending on how they are arranged and how they interact with each other.
For example, water molecules are arranged in a way that makes them liquid at room temperature.
Therefore, we can say that atoms themselves are not solid, but they can form solid matter when they bond with other atoms.
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