Vocabulary #2

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 chemicla properties as the element.

3.Nucleus: An atom"s dense center,where most of it"s mass is.

4.Electron: A negatively charged particle that moves around an atom"s nucleus.

5.Proton: A positively charged particle inside an atom"s nucleus.

6.Neutron: A particle with no charge inside an atom"s 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.