ELEMENTS

METALS

PROPERTIES OF METALS

• They are generally shiny
• They are good conductors of electricity
• They have a high melting and boiling point

USES OF GOLD

• Gold is used in rings
• Used for dentistry for fillings in teeth
• Used in most electrical devices

NONMETALS

NONMETAL PROPERTIES

• They are semiconductors and insulators
• Acidic oxides
• Can gain electrons but not lose them
• Ionic and covalent bonds

HYDROGEN

• Highly flammable
• Used to fix atmospheric nitrogen
• Used in methanol

METALLOIDS

METALLOID PROPERTIES

• Share characteristics of both metals and non-metals
• Typically semi-conductors
• Conduct heat and electricity

SILICON

• Used in computer chips
• Used for transistors
• Used for solar cells