structure and bonding questions 0.0 / 5 ? ChemistryStructure and bondingGCSEAQA Created by: EddieJ101Created on: 16-05-18 20:28 what is an ion? an atom with a charge 1 of 15 how does ionic bonding occur'? each atom loses or gains an electron. 2 of 15 why do ionic compounds have high melting and boiling points they have strong ionic bonds 3 of 15 how does covalent bonding occur? each atom shares an electron to create a full outer energy level 4 of 15 why do small Covalent molecules have low melting and boiling points? because they have weak inter-molecular forces 5 of 15 which are bigger, a nanoparticle or an atom a nano-particle as it contains several hundred atoms. 6 of 15 what happens to the surface to volume ratio of particles as particle size decreases by ten times it increases by 10 times. 7 of 15 give an advantage of nano-particles have an extremely high surface area to volume ratio 8 of 15 give a disadvantage of nanoparticles they can be absorbed into our cells which may lead to health problems in the future 9 of 15 why do giant covalent molecules have a high melting and boiling points because they contain strong covalent bonds which takes a lot of energy to break. 10 of 15 why can diamond not conduct electricty no free electrons to carry electrical charge. 11 of 15 why is graphite slippery it has no covalent bonds between the layers so the layers can slide 12 of 15 why is graphite a good conductor of electrcity it contains delocalised electrons 13 of 15 give 2 uses of fullerenes pharmaceutical delivery and lubricants 14 of 15 why is there a strong electrostatic attraction in metallic bonding as the positive metal ions are attracted to the negative sea of electrons 15 of 15
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