For instance, the Group 1 metals on the periodic table react with water to produce hydrogen and heat. Often this heat is enough to ignite the hydrogen. Long-term exposure to carcinogenic substances can result in cancers of various types. A number of substances have been found to be capable of producing cancer following exposure by inhalation, ingestion, or skin contact. Known carcinogens should not be used by students in our high school lab.
Mutagens are chemical and physical agents that induce mutations in DNA and in living cells.
This affects the genetic system in such a way as to cause cancer or hereditary changes in chromosomes. Individuals exposed to chemicals with mutagenic properties may develop genetic damage to the extent that future offspring will be affected. Known mutagens should not be used by students in our high school lab. Teratogens are chemical and physical agents that interfere with normal embryonic development. Teratogens differ from mutagens in that there must be a developing fetus.