Periodic Table Lesson

The periodic table

Key Points for this book(and any test over metals, non-metals, groups, periods, elements in group 0, 1 and 7)

​SUMMARY/KEY POINTS

​·         In the periodic table, metals are on the left of the stepped line, and non-metals are on the right of the stepped line

·         Most metals have high melting points. They are good conductor of heat and electricity. They are shiny and have a densities. They are malleable, ductile and sonorous.

·         ​Most non-metals have low melting points. Poor conductor of heat and electricity. In solid state: dull and brittle.

·         ​Metal oxides are basic. Those that dissolve in water from alkaline solutions. Non-metal oxides are acidic.

·         ​Physical properties describe things you can observe and measure.

·         ​Chemical properties describe how substances take part in chemical reactions.

·         ​You can use the arrangements of elements in the periodic table to explain and predict patterns in physical and chemical properties.

·         ​In the periodic table: horizontal = periods /and/ vertical = groups​

·         ​Across periods and down groups are patterns in elements´ properties.

·         ​Group 1 elements have low melting and boiling points, and low densities. They are reactive

·         ​Group 1 elements react vigorously with water to make hydroxides and hydroxides and hydrogen. The reactions get more vigorous from top to bottom of the group.

·         ​Going down group7 melting and boiling point increases. The colours gets darker. They are reactive

·         ​In a displacement reaction a more reactive element displaces a less reactive element form its compounds.

·         ​Group 0 elements are called nobel gases. They are unreactive.