Chemistry

• Hydrogen = H
• Helium = He
• Lithium = li
• Beryllium = be
• Boron = B
• carbon = c
• nitrogen = N
• Oxygen = o
• Fluorine = F
• Neon = ne
• sodium = Na
• Magnesium = mg
• Aluminium = Al
• Silicon = si
• Phosphorus = p
• Sulfur = s
• Chlorine = cl
• Argon = ar
• Potassium = K
• Calcium = ca
• Copper = cu
• Silver = Ag
• Iron = Fe
• Zinc = zn
• Diatomic molecules = Hydrogen, Oxygen, Fluorine, Bromine, Iodine, Nitrogen, chlorine
• NO = 2 elements
• Floss = coolest
• Element = one type of atom
• Compound = two elements bound toghether
• Mixture = two elements
• Molecule = two or more atoms held together
• metal = good conductor of electricity, good conductor of heat, high melting point, high density, is malleable, is sonorous, is ductile
• Non-metals = poor conductor of electricity , poor conductor of heat, is dull, low density, is brittle, not sonorous
• Properties of compounds do not equal the same as the elements they are made up from
• Chemical changes = new substance formed, not easily reversed
• Reactant = the substance which paired with the product to form a new substance
• Product = the substance caused by the chemical reaction
• Conservation of mass = mass cannot be created or destroyed
• Thermal decomposition = breaking down a compound by heating it in the presence of oxygen
• Signs chemical change has taken place = bubbles, heat changes, flames sparks, colour change