1. Periodic Table (Unit Two, Lesson 2.7) By Margielene D.
Judan
2. Lesson Outline: The Periodic Table Periods and Groups
3. THE PERIODIC TABLE The tabular arrangement of the chemical
elements It is called periodic because it exhibits a periodicity
(cycle) in the properties of elements. There are 115 elements, 92
occur naturally while others are artificially made.
4. THE PERIODIC TABLE They are arranged based on their atomic
number Atomic number the # of protons present in an element
5. THE PERIODIC TABLE Developed by Russian chemist, Dmitri
Mendeleev
6. GROUPS AND PERIODS Groups vertical arrangement Period
horizontal arrangement Elements along a group and period exhibit
some similarities in their properties
7. GROUPS AND PERIODS Look at your periodic table: For example,
group VIIA or 17 are called halogens. They are called salt- formers
because compounds containing halogens are classified as salts. (ex.
NaCl, CaCl2, MgI2)
8. GROUPS AND PERIODS Look at your periodic table: On the
leftmost side, there are the periods from 1 to 7.
9. Finding the location based on groups and periods Group
first, then period. For example: Oxygen is in group VIA or 16,
period 2 (G6A, P2 or G16,P2)
10. Examples: Phosphorus (P) G.5A,P.3 or G.15,P.3
11. Examples: Gold (Au) G.1B,P.6 or G.11,P.6
12. Find the location of the following elements using your
periodic table 1. Molybdenum (Mo) 2. Lanthanum (La) 3. Krypton (Kr)
4. Tungsten (W) 5. Carbon (C)
13. Find the location of the following elements using your
periodic table 1. Molybdenum (Mo) G.6B,P.5 or G.6,P.5 2. Lanthanum
(La) G.3B,P.6 or G.3,P.6 3. Krypton (Kr) G.8A,P.4 or G.18,P.4 4.
Tungsten (W) G.6B,P.6 or G.6,P.6 5. Carbon (C) G.4A,P.2 or
G.14,P.2
14. Quiz Tomorrow: Memorize the abbreviations of the elements
of the f-block only