Atoms and Elements.

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Presentation transcript:

Atoms and Elements

Draw a line between the molecule and its name. Hydrogen chloride HCl Chlorine Cl2 Carbon dioxide CO2 Methane CH4

atom atom An element An element An element is a substance that is made from one kind of atom only. It cannot be broken down into simpler substances. atom atom An element An element

A compound is a substance that is made from more than one element. atom atom A compound made up of 2 different elements A compound made up of 7 different elements

A compound can be broken down into elements An element An element A compound made up of 3 different elements An element

Water Coal Carbon dioxide Oxygen Chalk Wax Table salt Caffeine Material Made up of: Element or compound Water Hydrogen and Oxygen Coal Carbon Carbon dioxide Carbon and Oxygen Oxygen Chalk Calcium, Carbon & Oxygen Wax Carbon & Hydrogen Table salt Sodium & Chlorine Caffeine Carbon, Hydrogen, Nitrogen & Oxygen

THE PERIODIC TABLE

The Periodic Table is a useful way to arrange elements. The vertical columns are called groups. The horizontal rows are called periods. Elements in the same group have similar properties. Three quarters of the elements are metals. One quarter of the elements are non-metals.

Now look in your periodic table and find the symbols of the following elements: Copper …….. Iron ……….. Magnesium ……….. Chlorine ……….. Carbon ………… Sodium ……. Lead ………. Gold ……… Calcium …….. Fluorine ……….

Zn Cu Fe F Al N

The Periodic Table Q1. The symbol of Nitrogen is: a. Na b. N c. Ni Q2. The oxigen is a. Compound b. element c. mixture Q3. when you talk about water... H2O you talk about a. Pure substance b. Mixture Q4. Water is not in the periodic table because: a. It is a liquid substance b. It is a natural substance c. It is a compound not an element