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a current of 1 A for 1 hour.
6,02 x 1023 particles or objects. Also known as the number of particles in one mole...
a crystal lattice of positive kernels in a sea of delocalised electrons to which they are...
the process by which nitrogen passes through the ecosystem.
(also called allotropism) the property of some chemical elements to exist in two or more...
a group of elements between the metals and the non-metals. They are semiconductors and have some...