What are atoms?

What are atoms?

1. An atom is a particle of matter that uniquely defines achemical elements.

2. Atoms consist of a central nucleus and is usually surrounded by one or more electrons

3. Each electron is negativily charged, the nucleus is positively charge

4. The nucleus contains one or more relatively heavy particles known as protons and neutrons

5. Atoms were created after the Big Bang 13.7 billion years ago

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