The name Nerys is of Welsh origin. The meaning of Nerys is lady modern. Nerys is generally used as a girl's name. It consists of 5 letters and 2 syllables and is pronounced Ne-rys.
Nitrogen is a constituent of molecules in every major pharmacological drug class, including antibiotics. Many drugs are mimics or prodrugs of natural nitrogen-containing signal molecules: for example, the organic nitrates nitroglycerin and nitroprusside control blood pressure by being metabolized to nitric oxide.itrogen is present in all known living organisms, in proteins, nucleic acids, and other molecules. It typically makes up around 4% of the dry weight of plant matter, and around 3% of the weight of the human body.
The group 7 atoms are found on the right hand side of the periodic table next to noble gases. Halogens can be useful but they may also be dangerous and must be handled with care. This family includes fluorine, chlorine, bromine and iodine. Fluorine - Fluorine is a vary poisonous and dangerous gas. Fluorine is a diatomic molecule with the formula F 2. It has a pale yellow color. Chlorine - Chlorine is a poisonous gas which should only be used in the fume cupboard. Chlorine is a diatomic molecule with the formula Cl 2.