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When the hydrogen peroxide is heated, the particles have more energy so move faster. This means that they will collide more often, increasing the likelihood of successful collisions. More successful colli...
It is reduced because it gains an electron in the reaction and reduction is the gain of electrons, therefore the chlorine has been reduced.
Well... chemistry is the study of very tiny particles (electrons, atoms, molecules). It would be very hard for us to work with, and make calculations with, a single particle. A 'mole' is just 6.022x10^23 ...
The outer electron is further from the nucleus of the atom, therefore feeling less effective nuclear attraction . As you descend the group 1 metals, more shells of electrons are present in the metal...
CnH2n+2
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