Chemistry Revised Crossword Puzzle

QUESTIONS LIST:

• collision theory : the idea that for particles to react they must collide
• enzyme : proteins made by living cells, that acts as biological catalyst
• evaporation : where a liquid turns into gas at a temperature below its boiling points taking place at the surfae of a liquid
• reactant : a starting chemical for a reaction
• colorless : without color/no color
• dissolve : go into solutions
• compound : made of atoms of different elements bonded together
• halogen : group vii
• element : substance containing only one atom
• suspensions : cloudy mixture pf two or more substances that settle on standing
• condensation : the physical change in which a gas turns into a liquid in cooling
• mixture : containing two or more substance that are not chemically combined
• diatomic : its molecules contain 2 atoms joined by a covalent bond
• dilute solution : weak solution
• concentration : tells you how much of one substance is dissolved in another
• density : tells how light or heavy a substance is, using mass/volume
• boiling point : temperature at which a liquid changes to gas
• product : a chemical made in a chemical reaction
• water : chemical formula, h20
• particle : a minute portion of matter
• apparatus : the equipment used for a specific purpose
• atoms : smallest particle of a matter, cannot be break down any further
• ph scale : measure of the concentration of hydrogen or hydroxy l ions in a solution
• catalyst : increase the rate of a reaction and cannot be changed
• rate of reaction : how fast a reaction is