CHEMISTRY General topics Specific topics General and safety - Role of chemistry - What is chemistry? - Chemistry in everyday life - Laboratory equipment - Safety in laboratory - Laboratory equipment Safety - Signs of dangerous for risk management Mixtures and pure substances - Definition of mixtures - Types of mixtures - Methods for separating pure substances from mixtures (filtration, extraction, evaporation, distillation) - Physical and chemical changes of substances - Chemical compounds - Distinguish between pure substances and mixtures - Pure substances - Chemical elements are composed of one type of atoms - Atoms compounds of several elements are interconnected - Air is a mixture of gases and compare the properties of gases in air Solutions - Solutions as examples of mixtures and distinguish between solvent and solute, - Factors that affect the rate of dissolution of substances - Concept of solubility of substances and saturation of solutions - Understand the concept of water hardness and the importance of water softening - Understand the connection between water hardness and soap foaming Water - Distinguish between species or sources of water in nature, depending on what is dissolved in them (rainwater), spring water, groundwater, sea water, mineral water) - Water hardness Chemistry general - Atoms - Molecules Atoms - Structure of the atom - Atom model - Ions Subatomic particles, - Electronic chains - Ions Elements in the periodic table - Elements - Chemical elements are classified in periodic system and marked with symbols - Atomic number 4