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Marine plants (seaweeds) and many lower organisms have no mechanism to control osmosis, which makes them very sensitive to the salinity of the water in which they live.

The main nutrients for plant growth are nitrogen (N as in nitrate NO3) and potassium (K) followed by Sulfur (S), Magnesium (Mg) and Calcium (Ca).

Alpha decay of the The sum of the mass numbers of the products (234 4) is equal to the mass number of the parent nuclide (238), and the sum of the charges on the products (90 2) is equal to the charge on the parent nuclide.

Nuclei can also decay by capturing one of the electrons that surround the nucleus.

Believing them to be hybrid compounds, and therefore amenable to chemical change in laboratory reactions, the alchemists pursued the dream of to no avail.

“Any modern professor of chemistry today would be more than happy to hire some of these guys as lab techs.” The alchemists counted among their number Irish-born scientist Robert Boyle, credited as one of the founders of modern chemistry; pioneering Swiss-born physician Paracelsus; and English physicist Isaac Newton.Chemical elements in sea water do not exist on their own but are attracted to preferential ions of opposite charge: sulphur will occur mainly as sulphate, sodium as sodium chloride, and so on.Salinity and the main salt ions The salinity of sea water (usually 3.5%) is made up by all the dissolved salts shown in the above table.For example, all carbon atoms have six protons; isotopes of carbon can have 6, 7, or 8 neutrons (Table 1).Radioactive isotopes (also called , which is an electron, or negatively charged nuclear particle.

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