1.1-1.3 0.0 / 5 ? ChemistryAcids, bases and saltsIGCSEAQA Created by: ambh0yleCreated on: 17-02-14 15:42 what do atoms contain? protons, neutrons and electrons 1 of 18 what do atoms have in there nucleus? protons and neutrons and around which there are electrons. 2 of 18 in an atom are the number of electrons equal to the number of protons in the nucleus? yes 3 of 18 do atoms of different elements have different numbers of protons? yes 4 of 18 how do you know the number of protons in an element? it is its atomic number 5 of 18 The sum of protons and neutrons in an atom is called its what? mass number 6 of 18 each electron in an atom is at a particular what? energy level 7 of 18 the elements in group 0 of the periodic table are called what? the noble gases 8 of 18 are noble gases unreactive? yes, because their atoms have stable arrangements of electrons. 9 of 18 what is limestone used for? it is an essential building material. 10 of 18 what is limestone made from? mainly calcium carbonate (CaCO3) 11 of 18 how can calcium carbonate be decomposed? by heating(thermal decomposition), to make calcium oxide and carbon dioxide 12 of 18 how do The carbonates of magnesium, copper, zinc, calcium and sodium decompose? by heating in a similar way to calcium carbonate. 13 of 18 Calcium oxide reacts with water to produce what? calcium hydroxide 14 of 18 what can calcium hydroxide be used for? the neutralisation of acids. 15 of 18 what is the test to find carbon dioxide? A solution of calcium hydroxide in water (limewater) reacts with carbon dioxide to produce calcium carbonate. Carbon dioxide turns limewater cloudy. 16 of 18 when carbon dioxides react with acids, what do they produce? carbon dioxide, a salt and water 17 of 18 what is limestone damaged by? acid rain. 18 of 18
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