Chemistry 0.0 / 5 ? ChemistryAllGCSEOCR Created by: JesstracelynCreated on: 17-04-15 12:56 Do atoms have a positive or negative nucleus Positive charge 1 of 34 Do electrons have a positive or negative charge? Negative charge 2 of 34 If an atom loses and electron what charge does it have? Positive charge 3 of 34 If an atom gains and electron what charge does it have? Negative charge 4 of 34 Charged atoms are known as....? Ions 5 of 34 If a positive and negative ion meet they will be ....? to make..? Attracted to make an ionic bon 6 of 34 What is another main type of bond ? A covalent bond 7 of 34 What do atoms in a covalent bond share? A pair of electrons 8 of 34 Antioxidants are used for ...? preserving foods 9 of 34 Emulsifiers are used for ...? blending water and oil together in foods like salad cream and ice cream. 10 of 34 Hydrophilic ? Likes Water 11 of 34 Hydrophobic? Hates water 12 of 34 Hydrophobic tail or head? Tail - Hydrophillic head 13 of 34 When you heat baking powder, what is the process it undergoes ? Thermal Decomposition 14 of 34 What would help and speed up thermal decomposition A catalyst 15 of 34 What do you heat with an alcohol to make an ester? Organic acid/ Carboxylic acid 16 of 34 What is the equation for making an ester? Acid+Alcohol ~ Ester+Water 17 of 34 Name 3 properties a perfume must have 1)Easily Evaporates 2) Non-toxic 3) Doesnt react with water 4)doesnt irritate the skin 5)insoluble in water 18 of 34 How easily a liquid evapourates is called....? Volatility 19 of 34 Soloution? It is a mixture of the solute and solvent that does not seperate out. 20 of 34 solute? Its a substance being dissolved 21 of 34 solvent? it is the liquid its dissolving into 22 of 34 soluble Means it will dissolve 23 of 34 insoluble Means it will NOT dissolve 24 of 34 Solubility Measure of how much will dissolve 25 of 34 What does paint usually contain? Solvent, Binding Medium and pigment 26 of 34 The pigment gives the paint...? Colour 27 of 34 What do thermochromic pigments do? They change colour or become transparent when heated or cooled 28 of 34 Polymers are formed when small mollecules called ...... join together Monomers 29 of 34 The reaction polymerisation needs a high.... pressure and a catalyst 30 of 34 Plastics and polymers are usually ..... based Carbon 31 of 34 Monomers that make up addition polymers have a ........ covalent bond Double 32 of 34 Molecules with at least one double covalent bond between carbon atoms are called unsaturated compounds 33 of 34 molecules with no double bond between carbon atoms are called? Saturated compounds 34 of 34
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