Определяю валентность азота
- First, determine the oxidation number of nitrogen (N) in the given compound or molecule. This can be done by considering its electronegativity and the number of bonds it has with other elements. For example, in the compound NH3, nitrogen has an oxidation number of -3 because it is more electronegative than hydrogen and forms three bonds with hydrogen.
- Next, use the oxidation number of nitrogen to determine its valence electrons. Valence electrons are the outermost electrons of an atom that are involved in chemical bonding. For nitrogen, the number of valence electrons can be found using its group number, which is 5 in the periodic table. This means nitrogen has 5 valence electrons.
- Now, determine the valence of nitrogen by looking at its electron configuration. Nitrogen has 2 electrons in its first energy level and 5 electrons in its second energy level. Therefore, it has a total of 7 electrons and since it needs 8 electrons to have a full outer shell, it's valence is -3 or 5 (since 5 - (-3) = 8).
- Finally, consider the overall charge of the compound or molecule. If the compound is neutral, then the valence of nitrogen is equal to its oxidation number. However, if the compound has a charge, then the valence of nitrogen needs to be adjusted accordingly to maintain the compound's overall charge. For example, in the compound NH4+, nitrogen's valence is now +1 because it has to balance out the +1 charge of the ammonium ion.
