Vocabulary 2 - Elements and Atoms

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

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

Nucleus: an atom`s dense center, where most of it mass is.

Electron: a negatively charged particle that moves around an atom`s nucleos.

Proton: a positively charged particle inside an atom`s nucleus.

Neutron: a particle with no charge inside an atom`s nucleos.

Atomic Number: the number of protons in an atom.

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