bonding, structure and properties of matter questions from the book 0.0 / 5 ? Chemistrybonding, structure and properties of matter.GCSEAQA Created by: Ellie-Mai16Created on: 03-10-17 13:11 what does the state symbol(I) indicate? Liquid. 1 of 23 what does the state symbol (aq) indicate? Aqueous / dissolved in water. 2 of 23 How do the particles in the gas smove? Quickly and randomly in all directions. 3 of 23 Why do ionic compounds have high melting points? to melt, the strong bonds between the ions must be broken. tis requires lots of energy,, so it only hapens at igh temperatures. 4 of 23 state three limitations of the particle model? - higher tier the particle model does not take into account: the forces between the particles; the volume of the particles; or the space between tthe particles. 5 of 23 What is an Ion? Atoms that have gained or lost electrons and now have an overall charge. 6 of 23 Why do metals form positively charged Ions? They lose electrons. 7 of 23 The ionic compound potassium chloride contains potassium ions (K ) and chloride ions (Cl ). what i the formula for potassium chloride? KCl 8 of 23 Why do ionic compounds coonduct electricity when molten? the ions in molten ionic compounds can move about, carrying their charge. 9 of 23 Describe what a metalic bond is. An attraction between the positive metal ions and the delocalosed electrons. 10 of 23 Why is copper a good material for water pipes? it is an unreactive metal, so it does not react with water, and it can be easily shaped. 11 of 23 what is an alloy ? A ixture that contains a metal and at least one other element. 12 of 23 Why are alloys more useful than pure metals? they are usually stronger and harder than pure metals. 13 of 23 give two useful properties than stainless steel has but pure ion does not have . Hard; resistant to corrosion. 14 of 23 what is a covalent bond? A shared pair of electrons between atoms. 15 of 23 Why does hydrogen chloride have a low boiling point? It is a simple molecule- although there is a strond covalent bond wihin the molecule, there are onlt weak intermolecular forces between molecules. 16 of 23 How does the size of a simple molecue affect the strength of the intermolecule forces between molecules? the larger the molecule, the stronger the intermolecular forces between molecules. 17 of 23 describe the structure of a diamond. each carbon atoms forms four strong covalent bonds with other carbon atoms. 18 of 23 Explain how graphite can conduct electricity. the delocalised electrons can move and carry their charge. 19 of 23 what is special about the structure of graphene? it is a single layer o graphite , just one atom thick. 20 of 23 Which is the most stable fullerene? Buckminsterfullerene 21 of 23 How big are nanoparticles? 1 billionth of a meter writen as 1nm or 1x10 m. 22 of 23 What potential problems could nanoparticles cause? they could potentially damge human cells or the environment. 23 of 23
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