bondng
properties of ionic compounds
states of matter
metallic bonding
nano particle and their uses
ionic bonding
covalent bonding
the three main states of matter are solid(s) liquid(l) and gas(g). there is also another state of matter aqueous(aq) which means dissolved in water
some key word linked to state of matter are, melting, evaporating, freezing, condensing and sublimation
is a bond formed between 2 metal atoms
involves, transferring of electrons, if a atom loses an electron it has a positive charge if it gains an electron it has a negative charge
e.g. mg+2 and o-2 mg would share 2 electrons to oxygen
2d shows how closely packed ions are, only shows one layer
bal and stick ratio of molecules, shows space between - unreal
3d shows forces in all directions, doesnt show electrons
dot and cross shows electrons in bond
formed between 2 non metal elements
involves sharing of electrons
e.g nitrogen has 5 outer shell ectrons so each nitrogen would share 3 electrons so they would become stble
metallic bond, force that holds atoms together in a metallic substance. Such a solid consists of closely packed atoms. In most cases, the outermost electron shell of each of the metal atoms overlaps with a large number of neighbouring atoms
Nanoparticles are 1 nm to 100 nm in size. They have very large surface area to volume ratios.
Nanoparticles are tiny particles which are between 1-100nm in size. Structures that are 1-100nm in size and are made of a few hundred atoms are known as nanoparticles. These are extremely small.