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the decayed organic material (plant and animal matter) that forms the top layer of soil
states that the p, d and f orbitals can only take on a second electron when all the equivalent...
Huygens' principle regards every point on a wave front as a source of secondary wavelets that...
cartilage with few collagen fibres and no elastin fibres. It reduces friction in joints,...
secretory tissue in the leaves of plants that secretes water through pores in the epidermis or...
(also called fracking) the process of drilling for shale gas (a natural gas) and extracting...
a clear, colourless solution of hydrogen chloride (HCl) in water. It is a strong and highly...