TABLE. O nome da tabela, deverá expressar o que será armazenado em seu conteúdo, para facilitar a leitura e entendimento do modelo de dados (MER) e também a criação dos outros objetos que a utilizarem. Deve ser escrita em caixa baixa e não deve conter acentos ou plural.
TABLE. 6.1.1 Prefixes for the number of atoms in chemical names Prefix Number mono- 1 di- 2 tri- 3 tetra- 4 penta- 5 hepta- 6 hepta- 7 octa- 8 nona- 9 deca- 10 undeca- 11 dodeca- 12 If the molecule contains more than one atom of both elements, then for both prefixes are used prefix. Thus, N2O3 is a dinitrogated trioxide, as shown in figure 6.1.1. In some names, the final A or o prefix is dropped to avoid awkward pronunciation. Thus, OsO4 is an osmium tetraoxide, not a t tetraoxide osmium. Write the name of the connection. Binary compounds of elements with oxygen are commonly referred to as element oxide, with prefixes indicating the number of atoms of each element per unit of formula. For example, CO is carbon monoxide. The only exceptions are the binary oxygen compounds with fluoride, called oxygen fluoride, according to the rules for the most electronegate element, which is regarded as anion for naming purposes. Some connections are always called common names that were assigned long ago when names rather than formulas were used. For example, H2O is water (not dihydrogen oxide); NH3 - ammonia; PH3 is phosphine; SiH4 - silan; and B2H6, the BH3 dimer, is a diboran. For many compounds, the systematic name and common name are used frequently, so you should be familiar with them. For example, the systematic name NO is nitrogen oxide, but it is much more commonly referred to as nitrogen oxide. Similarly, N2O is commonly referred to as nitrous oxide rather than dinitrogen oxide. Note that the suffixes are -ic and -ous the same ones that are used for ion compounds. Start with the item on the left in the periodic table and work to the right. If two or more items are in the same group, start with the bottom element and work up. Write the name of each binary covalent compound. Considering: Molecular Formula Asked: The name of the Connection Strategy: The list of items is in order according to their positions in the periodic table. Determine the number of each type of atom in the chemical formula, and then use table 6.1.1 to determine the necessary prefixes. B If If not, decide whether to use a common name or a systematic name. Solution: Because sulfur sulfur to the left of the fluoride in the periodic table, the sulfur is called the first. Since there is only one sulfur atom in the formula, no prefix is required. B There are, however, six fluoride atoms, so we use the prefix for six: hex- (table 6.4.1). A compound of sulfur hexafluoride. Because nitrogen is left of oxygen ...