1. Atomic Structure Early Atomic TheoryDemocritus (400 BC) suggested that the world was made of 2 thing empty space and tiny, invisible particles calledatoms . 2. Aristotle…

Slide 1The Life of a Cell Slide 2 Chemistry Element - A substance that can not be broken down into simpler substance. Trace elements are found in living things in very small…

Slide 1Chemistry Slide 2 chemistry: (k ĕ m' ĭ -str ē ) n. The study of the composition, structure, properties, and reactions of matter (everything that makes up the…

Slide 1Atoms, Elements, and the Periodic Table Slide 2 PART 1: ATOMS 1.What are atoms made of? NUCLEUS – center of the atom PROTON (+) (in nucleus) NEUTRON (0) (in nucleus)…

1.Chapter 3 Substances are made of atoms2. Natural Philosophy Heraclitus versus Parmenides Heraclitus – everything is in the process of change Parmenides – Change is…

1. Nuclear Decay October 15 nd& 16 th , 2009 2. The Atom- Review The atom consists of two parts: 1.The nucleus which contains: 2.Orbiting electrons. protons neutrons…

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1. Structure of an atom and much more Submitted By:- Deepak Saxena of Class ixth ‘B’ Session : 2010-2011 People’s Public School 2. Contents 1. Atom 2. Electrons (e-)…

Slide 1ElementSymbol # of protons # of neutrons # of electron Atomic # Mass # Oxygen8816 SiliconSi141428 AluminumAl141313 Iron2656 Ca202040 BELLWORK: WEDNESDAY 2/22/2012…