Elements & Compunds

 A pure substance that cannot be broken down

• When two or more substances are mixed together
• Not chemically changed

Two or more elements are chemically bonded together

• Positively charged particle inside the nucleus
• Number of protons determines its atomic number

• Subtonic particle inside the nucleus
• No electric charge

Negatively charged particle surrounding the nucleus

Smallest unit of matter

• Solid & Hard
• Shiny
• Malleable (able to be shaped or molded)
• Fusible (able to be melted)
• Ductile (withstand change in shape)
• Good thermal and electrical conductivity

• Not metals
• Dull
• Fragile
• Poor thermal and electrical conductivity

• Element whose properties are both metal and non metal
• Electrical semi-conductors

Atoms of the same element join

• Place HCC and marble chips in a side arm test tube (with rubber stopper ontop) having the rubber tubing drain into a beaker of limewater
• Blowing into a test tube of limewater with a straw creating small bubbles

Burn the end of a wooden stick then put it out. Stick the end of the stick into a test tube containing hydrogen peroxide and manganese dioxide