The periodic table & hard and soft water 4.0 / 5 based on 1 rating ? ChemistryThe Periodic TableWater hardness and solubilityGCSEAQA Created by: mollytaylor9Created on: 14-12-15 18:55 41032681795 Across 1. Magnesium ions and calcium ions get in to the water by CO2 acid dissolved into the water eroding/dissolving _________ until it becomes part of the water (9) 5. What are group 1 elements also known as? (3, 6, 6) 8. As you go down the group, the halogens become ____ reactive (4) 9. Do transition metals have low or high melting points? (4) Down 2. Why are the noble gases very unreactive? (4, 5, 5) 3. Transition metals are ____ and strong and bright and _____ (4, 5) 4. Water is treated by adding ________ and passing through different stages like filter beds before this. (8) 6. Which hard water forms scum? (7) 7. Group 1 elements react with _____ to make hydrogen. (5) 10. Where are the transition metals found?: left, middle,right on the periodic table (6)
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