What are the categories into which chemical substances are categorized? please correct. .it's urgent guys. ...
Answers
Answer:
Explanation:
Chemical substances have been used in Canada for decades - some for hundreds of years. As a common part of everyday life, chemical substances can be a by-product of other processes, be deliberately created, or occur naturally in the environment.
Industry and other organizations use chemical substances for research, developing new products, and in the production of the many consumer products we use.
Like many countries, Canada's laws say companies must submit their new chemical substances for scientific assessment before they can be manufactured or imported.
However, many chemical substances have been used for much longer than these laws have been in place. Although some older, existing substances have been examined by environmental and health scientists in government, many have not.
Categorization was required by the Canadian Environmental Protection Act, 1999 (CEPA 1999) and is a first step to finding out which of these chemical substances require further attention in the form of assessment, research and/or measures to control their use or release.
Answer:
Since the properties of compounds and elements are uniform, they are classified as substances. When two or more substances are mixed together, the result is called a mixture. Mixtures can be classified into two main categories: homogeneous and heterogeneous