By means of optical and electron microscopy and by preferential chemical dissolution ... form of this cell structure has already been reported in porous aluminium oxide films 1.

In particular, studying ammonium borate anodic films on aluminium, he found by electron diffraction that the pseudo-amorphous structure of ... passing through the oxide layer, and combining ...

When you burn the iron it reacts with oxygen to make iron oxide ... chemical formulas contain little numbers called ‘subscripts’. They represent the number of atoms of each element in the formula.