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The most serious disadvantage is the limited types of knowledge that can be assessed by multiple choice tests. Multiple choice tests are best adapted for testing well-defined or lower-order skills. Problem-solving and higher-order reasoning skills are better assessed through short-answer and essay tests.
Chemical classification systems attempt to classify elements or compounds according to certain chemical functional or structural properties. Whereas the structural properties are largely intrinsic, functional properties and the derived classifications depend to a certain degree on the type of chemical interaction partners on which the function is exerted.
A compound can be transformed into a different substance by a chemical reaction, which may involve interactions with other substances. In this process, bonds between atoms may be broken or new bonds formed or both. There are four major types of compounds, distinguished by how the constituent atoms are bonded together.
An inorganic compound is typically a chemical compound that lacks carbon–hydrogen bonds — that is, a compound that is not an organic compound. [ 1 ] [ 2 ] The study of inorganic compounds is a subfield of chemistry known as inorganic chemistry .
These pictographs are also subdivided into class and categories for each classification. [13] The assignments for each chemical depends on their type and their severity. The standard set of 9 hazard pictograms was published and distributed as a regulatory requirement through the efforts of the United Nations via the Globally Harmonized System ...
IARC group 3 substances, chemical mixtures and exposure circumstances are those that can not be classified in regard to their carcinogenicity to humans by the International Agency for Research on Cancer (IARC).
Although most compounds are referred to by their IUPAC systematic names (following IUPAC nomenclature), ... Other fluorides: AlF 3, AmF 3, NH 4 F, NH 4 HF 2, ...
Binary compounds (3 C, 9 P) C. Chalcogenides (9 C, 16 P) Chelating agents (5 C, 164 P) ... List of chemical classifications; Concentrate; D. Derivative (chemistry ...