answers

IONIC COMPOUNDS 2 1) Fill in the missing words in the passage below. lons are particles that have a different number of protons and .. ... Ions are electrically charged . Ions can be formed when a metal reacts with a non-metal. Metal atoms ... ... electrons to form ........ ions. Non metals um sesam150.. electrons to form ...... 2) Which of the following compounds have ionic structures? Indicate with v/*. ethane, CaHs ..... hydrogen sulfide, HaS ...... copper oxide, CuO ...... zinc bromide, ZnBl; ... Ammonia, NH; ...... Magnesium oxide (MgO) contains magnesium ions (Mg" ) and oxide ions (U- ). a) Draw the electronic structure of these ions on the diagram. magnesium ion (My)") oxide ion (0'] b) Explain what the formula Mgo means. 4) a) Explain why ionic compounds have high melting and boiling points. b) Explain why ionic compounds conduct electricity when melted or dissolved in water. c) Explain why ionic compounds do not conduct electricity as solids. .....xxx 5) Which of the following substances are ionic? ... .418:$18:84181:$15848281458:$80814181818584580846845641898418984689486841 848 1841845 Electrical conductivity a Substance Melting point ("C) Boiling point ("C) solid liquid solution (aq) A 650 1107 conducts conducts Insoluble B 114 184 does not conduct does not conduct does not conduct C 801 1467 does not conduct conducts conduct D 2040 2980 does not conduct conducts insoluble E 118 445 does not conduct does not conduct insoluble F 1610 2230 does not conduct does not conduct insoluble Area Strength To develop Area Strength To develop Area Strength To develop Done with care and thoroughness Knows which compounds are ionic Explain conductivity ol ionic epds Good SPG Draw the election structure of ins Knows properties of ionic compounds Knows why lans are charged Understands meaning of ionic formula What happens with motal + non-motal Why ionic compounds have high im pi