The Atom.

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Presentation transcript:

The Atom

Nucleus The center of the atom Has a positive charge What gives it this positive charge?

Proton Positively charged Located in the nucleus

Neutron No electrical charge Neutral Located in the nucleus

Electron Negatively charged Surround the nucleus Electron clouds

Atomic Mass Unit The SI unit used to express the masses of the particles in an atom Proton = 1 amu Neutron = 1 amu Electron = negligible

Atomic Number Atomic Number The number of protons in an atom Identifies the atom as a particular element Atomic Number

Mass Number The sum of the protons and neutrons in an atom

Isotopes Atoms that have the same number of protons but different number of neutrons Share most of the same properties

Atomic Mass Atomic Mass Weighted average of the masses of all the isotopes of an element Atomic Mass

Atomic Number Chemical Symbol Name of Element Atomic Mass # of _________________ and # of _________________ Chemical Symbol Name of Element # of _________________ + _________________ Atomic Mass

Cu # of protons = ________ # of electrons = ________ # of neutrons = ________ Cu

Cool Video http://www.youtube.com/watch?v=DZGINaRUEkU