periodic table

periodic table

• All the different elements are arranged in a chart called the periodic table.
• Column 1 are reactive metals, and all the elements in column 0 are un-reactive non-metals. The zig-zag line in this diagram separates the metals, on the left, from non-metals.
• Most elements are metals, rather than non-metals.
• Metals and non-metals have opposite properties to each other. It is usually easy to tell metals and non-metals apart.
• In the periodic table the elements are arranged into:
• rows, called periods, in order of increasing atomic number
• vertical columns, called groups, where the elements have similar properties

metals

• Metals react with oxygen to produce compounds called metal oxides.
• For example, magnesium reacts with oxygen to produce magnesium oxide. The reaction can be represented by this word equation:
• magnesium + oxygen → magnesium oxide
• Metal oxides are bases. They react with acids and neutralise them. Some metal oxides dissolve in water and, when they do, they produce alkaline solutions.

non-metals

• Non-metals react with oxygen to produce non-metal oxides. For example, sulfur reacts with oxygen to produce sulfur dioxide. The reaction can be represented by this word equation:
• sulfur + oxygen → sulfur dioxide
• Non-metal oxides react with bases and neutralise them. Some non-metal oxides dissolve in water and, when they do, they produce acidic solutions.