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the energy level, or shell, of an atom that contains the valence electrons.
adhesive (sticky) and elastic, tending to gather together in drops rather than spread over a...
small electrical cells such as those in watches, pacemakers, hearing aids and calculators.
a lobe-shaped orbital in which electrons may move. There are 3 p orbitals per energy level from...
sulfur dioxide is extremely soluble in water, forming sulfurous acid. This acid oxidises to form...
electromagnetic waves, similar to X-rays, but with a much shorter wavelength.