Atoms and Periodic Table Notes

Atoms

Everything around us is matter made up of atoms. Atoms have 3 main parts, the nucleus, the electron shells, and the electrons. Every atom is listed on the periodic table and has an atomic number and an atomic weight. An atomic number is the number of protons in the nucleus of the atom. The atomic weight is the combined number of protons and neutrons in the atom.  The number of electrons is equal to the number of protons.   2 electrons are allowed on the 1st electron shell and 8 on every electron shell following. 

ELements, Mixtures, Compounds.

Below is a diagram which specifies what elements compounds and mixtures are and shows what those atoms would/could look like.

Periodic Table

First 20 elements of the Periodic Table: Hydrogen, H Helium, He Lithium, Li  Beryllium, Be Boron, Bo Carbon, C Nitrogen, N Oxygen, O Fluorine, F Neon, Ne Sodium, Na Magnesium, Mg Aluminium, Al Silicone, Si Phosphorus, P Sulfur, S Chlorine, Cl Argon, Ar Potassium, K Calcium, Ca

Notes: The Periodic Table is divided into periods ( >) which go across and groups which go down.   

Metal and Non - Metal Properties

METAL - Physical Properties Conduct Energy Conduct Heat Sonorous sound Reflective surface Higher Density Some are Magnetic, Iron, Nickel, Cobalt. Opaque High Melting Point Malleable  

Other Common Elements

S = Sulfur N = Nitrogen O = Oxygen Co = Cobalt Cu = Copper Fe = Iron Na = Sodium Zn = Zinc Pb = Lead Au = Gold Ag = SIlver Ni = Nickel

Common Compounds

Sulphur dioxide - SO2 Copper oxide - CuO Magnesium oxide - MgO Salt - NaCl Copper Sulphate - CuSO4 Calcium Carbonate - CaCO3 Ammonia - NH3 Methane - CH4 Chlorine - Cl2