Subject: Chemistry 1 The Periodic Table.

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Presentation transcript:

Subject: Chemistry 1 The Periodic Table

Atomic Symbol (used in the Periodic Table) Atomic number 6 = Number of protons C Name Carbon Average Mass in a.m.u. “atomic mass unit” 12.01 = The mass of the atom

Do… Take out your (copy of ) the Periodic Table In your own Periodic Table, carefully mark the Groups, Periods, and Families as explained in the following screens… (Notice the jump from Group 2A to Group 3A, but the Periods are continuous 1 through 7)

Group 1A Groups and families in the Periodic Table Group 8A Group 2A Group 3A Group 4A Group 5A Group 6A Group 7A Period 1 Period 2 Period 7

Noble gases, or inert elements Alkaline metals The Families… Noble gases, or inert elements Alkaline earth metals Halogens Lanthanides Actinides

Homework Assignment: a) Use your textbook to find what are the semi-metals, or “metalloids”. Then b) Color your Periodic Table, as follows: Metals – Orange Non-metals – Blue Semi-metals – Red c) Complete the following table: (next screen) d) Label alkaline metals, alkaline earth metals, halogens, noble gases.

Find the following elements in the Periodic Table, and write: The atomic symbol The nuclear symbol The group it belongs to The period it belongs to The family (or families) it belongs to chlorine argon sodium gold a) b) c) d) e)