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2. Ammonia - Wikipedia

   en.wikipedia.org/wiki/Ammonia

   Ammonia is an inorganic chemical compound of nitrogen and hydrogen with the formula N H 3. ... Of these, 39 were tabulated in extensive tables of the chemistry among ...

3. Ammonia (data page) - Wikipedia

   en.wikipedia.org/wiki/Ammonia_(data_page)

   The table above gives properties of the vapor–liquid equilibrium of anhydrous ammonia at various temperatures. The second column is vapor pressure in kPa. The third column is the density of the liquid phase. The fourth column is the density of the vapor.

4. List of chemical elements - Wikipedia

   en.wikipedia.org/wiki/List_of_chemical_elements

   Like the periodic table, the list below organizes the elements by the number of protons in their atoms; it can also be organized by other properties, such as atomic weight, density, and electronegativity. For more detailed information about the origins of element names, see List of chemical element name etymologies.

5. Periodic table - Wikipedia

   en.wikipedia.org/wiki/Periodic_table

   The periodic table and law are now a central and indispensable part of modern chemistry. The periodic table continues to evolve with the progress of science. In nature, only elements up to atomic number 94 exist; [a] to go further, it was necessary to synthesize new elements in the laboratory.

6. Ammonium - Wikipedia

   en.wikipedia.org/wiki/Ammonium

   The ammonium ion is mildly acidic, reacting with Brønsted bases to return to the uncharged ammonia molecule: [NH 4] + + B − → HB + NH 3. Thus, the treatment of concentrated solutions of ammonium salts with a strong base gives ammonia. When ammonia is dissolved in water, a tiny amount of it converts to ammonium ions: H 2 O + NH 3 ⇌ OH − ...

7. Group 5 element - Wikipedia

   en.wikipedia.org/wiki/Group_5_element

   Group 5 is a group of elements in the periodic table. Group 5 contains vanadium (V), niobium (Nb), ... or precipitated with ammonia as the pentoxide: [26] ...

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9. Atomicity (chemistry) - Wikipedia

   en.wikipedia.org/wiki/Atomicity_(chemistry)

   The most common values of atomicity for the first 30 elements in the periodic table are as follows: Atomic Number Element Atomicity 1 Hydrogen (H) 2 2 Helium (He) 1 3