Vocabulary # 2 Elements and Atoms

1. Element: A substance that cannot be broken down any further into anything simpler.

2. Atom: The smallest particle of an element that has the same chemical properties as the element.

3. Nucleus: An atoms´s dense center, where most of it mass is.

4. Electron: A negatively charged particle that moves around an atoms nucleus.

5. Proton: a positively charged particle inside an atoms nucleus.

6. Neutron: a particle with no charge inside an atoms nucleus.

7. Atomic number: the number of protons in an atom.

8. Metal: any of a group of elements that conduct heat and electricity, is shiny and bendable.