CHAPTER 3
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
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What is it called when atoms share electrons
covalent bonding
what is it called when atoms transfer electrons
ionic bonding
what arrangement is formed when ionic bonding occurs
giant structure/ giant lattice
characteristics of ionic compounds
high melting points conduct electricity
characteristics of simple molecules
weak intermolecular forces forces cant carry electricity
why can graphite conduct electricity
delocalised electrons carry charge
what are fullerenes
hollow shapes molecules of carbon
uses of fullerenes
transport drugs catalyst reinforcement
what is graphene
1 atom thick graphite
what is metallic bonding
when the negative electrons holds the positive nuclei in position
what is an alloy
mixture of two elements at least one of which is metal
why can metals bend
the layers slide over eachother
why do nano particles have different properties
large SA to volume ratio
uses of nano particles
sun cream glass cosmetics
what is it called when a solid changes directly to a gas
sublimation
what is a compound
something that contains two or more elements
when electrons have been gained what is the charge of the ion
negative
what arrangement do ionic bonds give
giant lattice
why do lattices have such high boiling points
the ionic bonds act in all directions on an atom
why will molten or dissolved ionic compounds conduct electricity
ions free to move
what are the three states of matter
solid, liquid, gas
characteristics of particles in solid
packed closely together vibrate in fixed positions
characteristics of liquid
close together but can slide round
characteristics of gas
lots of empty space of particles to move around