so-called photosynthesis begins. the plant cells are binding co and toxins from their surroundings and produce oxygen. the production of oxygen is actually quite visible, as small bubbles are formed under the leaves which are easily to be seen. which of the effects is the domi- nating one is still not...
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very common as it does not form very large crystals. however, it often replaces other minerals on an atom by atom basis and forms what are called pseudomorphs (false shape). the talc takes the form of the mineral it replaces. a specimen of what looks like milky quartz is quite a surprise when it not...
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the symbol k (from neo-latin kalium) and atomic number . elemental potassium is a soft silvery-white alkali metal that oxidizes rapidly in air and is very reactive with water, generating sufficient heat to ignite the hydrogen emitted in the reaction. potassium and sodium are alkali metals and are chemically...
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