2. ELEMENT A pure substance cannot be subdivided into any simpler substances by physical or chemical process COMPOUND A substance that contain two or more different types of elements that are chemically bonded together
3.
4. Proton Electron Neutron 1 1/1840 1 +1 -1 0 Proton number : Total number of proton in the nucleus of an atom Nucleon number : Total number of proton and neutron in the nucleus of an atom In the nucleus In the shells Position Relative Charge Relative Mass Subatomic Particle
5. Standard Representation Of An Element X - Symbol of an element A – Nucleon number of atom X Z – Proton number of atom X A Z X
6.
7. Sodium ELEMENT Sodium ELEMENT Sodium ELEMENT Sodium ELEMENT Sodium ATOM Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na
9. SODIUM ELEMENT Sodium element consist with many sodium atoms Electron arrangement of sodium element is 2.8.1 Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na Na
10. Standard Representation For Sodium Element The Structure Of Sodium Atom 11p + 12n The Electron arrangement Of Sodium Atom 23 11 Na Na
11. 11 11 12 11 12 2.8.1 1 1 3 3 Period Number of shells Group Number of valence electrons Electron arrangement Nucleon number Proton number Number of neutron Number of electron Number of proton 23 11 Na
12.
13. EXAMPLE : PERIOD 3 ELEMENT 2.8.8 2.8.7 2.8.6 2.8.5 2.8.4 2.8.3 2.8.2 2.8.1 ELECTRON ARRANGEMENT 18 17 16 15 14 13 12 11 PROTON NUMBER Ar Cl S N Si Al Mg Na ELEMENT
14. GROUP PERIOD Inert Gases in The Periodic Table Of Element Why are these elements located in Group 18? I 2 13 14 15 16 17 18 1 2 3 4 5 6
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