Edexcel Combined Science: Chemistry Paper

3D space filled models advantages. - correct answersVery useful to see the shapes of molecules or structures. 3D space filled models disadvantages. - correct answersDo not show how atoms are bonded. Do not allow all atoms to be seen. Cannot determine formula from them. Anode - correct answersPositively charged electrode. Attracted to anion. aqueous solution - correct answersa solution in which the solvent is water Cathode - correct answersNegatively charged electrode. Attracted to cation. Complete this equation: acid + metal -- - correct answerssalt + hydrogen Complete this equation: acid + metal carbonate -- - correct answerssalt + carbon dioxide + water Complete this equation: acid + metal hydroxide -- - correct answerssalt + water Complete this equation: acid + metal oxide -- - correct answerssalt + water Do acidic solutions have high or low pH values? - correct answerslow (less than 7) Do alkaline solutions have high or low pH values? - correct answershigh (greater than 7) Dot and cross diagram advantages. - correct answersUseful for showing how compounds or molecules are formed and where the electrons in the bonds or ions came from. Dot and cross diagram disadvantages. - correct answersThey don't show the structures formed and they suggest that the electrons in different atoms are different, when they