Periodic Table

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Information about Periodic Table
Education

Published on July 22, 2008

Author: dawsjonz

Source: authorstream.com

Periodic Tableof Elements : Periodic Tableof Elements Slide 2: Element An element is a substance that is made up of ONE kind of atom only. e.g. Carbon Slide 3: An atom is made up of : protons neutrons electrons Slide 4: Protons Are small positively charged particles found in the nucleus of an atom. + ve Slide 5: Neutrons Are small particles with no charge found in the nucleus of an atom. Slide 6: Electrons Are very tiny negatively charged particles that move around the nucleus of an atom. - ve Slide 8: Element Each element has its own symbol made up of one or two letters. There are approximately 110 different known elements. Slide 9: Element The first letter is always a CAPITAL letter. If there is a second letter it is always a SMALL letter. Slide 10: The Periodic Table of Elements All 110 elements can be arranged in a table that shows the relationships between the different elements. Slide 11: The Periodic Table of Elements Each element is arranged according to its atomic number. Slide 12: Atomic Number Each element of the periodic table has its own atomic number. The atomic number is equal to the number of protons in the nucleus of the atom. Slide 13: H 1 Hydrogen 1 He 2 Helium 2 Li 3 Lithium 2. 1 Be 4 Beryllium 2. 2 B 5 Boron 2.3 C 6 Carbon 2.4 N 7 Nitrogen 2.5 O 8 Oxygen 2 6 F 9 Fluorine 2.7 Ne 10 Neon 2.8 Na 11 Sodium 2. 8. 1 Mg 12 Magnesium 2. 8. 2 Al 13 Aluminium 2. 8. 3 Si 14 Silicon 2. 8. 4 P 15 Phosphorus 2.8. 5 S 16 Sulfur 2. 8. 6 Cl 17 Chlorine 2. 8. 7 Ar 18 Argon 2.8. 8 K 19 Potassium 2.8.8.1 Ca 20 Calcium 2.8.8.2 Periodic Table S 16 Sulfur 2. 8. 6 Atomic number name electron arrangement symbol KEY Slide 14: Look at the next picture of the periodic table. Where are the metals found? Where are the non-metals found? Slide 15: H 1 Hydrogen 1 He 2 Helium 2 Li 3 Lithium 2. 1 Be 4 Beryllium 2. 2 B 5 Boron 2.3 C 6 Carbon 2.4 N 7 Nitrogen 2.5 O 8 Oxygen 2 6 F 9 Fluorine 2.7 Ne 10 Neon 2.8 Na 11 Sodium 2. 8. 1 Mg 12 Magnesium 2. 8. 2 Al 13 Aluminium 2. 8. 3 Si 14 Silicon 2. 8. 4 P 15 Phosphorus 2.8. 5 S 16 Sulfur 2. 8. 6 Cl 17 Chlorine 2. 8. 7 Ar 18 Argon 2.8. 8 K 19 Potassium 2.8.8.1 Ca 20 Calcium 2.8.8.2 Periodic Table Metals Non- metals Special Slide 16: The metals are found on the LEFT hand side of the periodic table. The non-metals are found on the RIGHT hand side of the periodic table. Answer : Slide 17: Electron Arrangement The electrons are arranged around the nucleus of an atom in energy levels. Slide 18: The 1st energy levels holds a maximum of : The 2nd energy levels holds a maximum of : The 3rd energy levels acts as if it is full when it has : 2 electrons 8 8 Slide 19: i.e. Magnesium 2. 8. 2             Mg 1st energy level 2nd energy level 3rd energy level Magnesium atomic no. 12It has 12 protons & 12 electrons. Slide 20: Mass Number Each element has a different mass. Both protons and neutrons are given a mass of 1. Because electrons are so small we ignore their mass. Slide 21: Mass Number The mass number of an atom = the sum of the protons and the neutrons in the nucleus of an atom Slide 22: Mass Number Mass Number = 11 + 12 11 protons 12 neutrons e.g. Sodium has = 23 Slide 23: The larger number is the MASS Number The smaller number is the ATOMIC Number Write down all the information that the box provides. Slide 24: The element is chlorine. It has the symbol Cl. It has an atomic no. of 17. It has 17 protons in its nucleus. It tells us : Slide 25: It has 17 electrons going around the nucleus. It has a mass number of 35. It has 18 neutrons in its nucleus. The electron arrangement is 2.8.7. It tells us :

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