1 paroxysmal Pertaining to or marked by paroxysm; caused by paroxysms or convulsions of nature. 2  paroxysmal Specifically In geology: Relating to or produced by a violent convulsion of nature.
Inorganic lead compounds are Group 2A - Probably carcinogenic to humans. American Conference for Governmental Industrial Hygienists (ACGIH): A3 - Confirmed animal carcinogen. Teratogenicity / Embryotoxicity: DEVELOPMENTAL HAZARD. May harm the unborn child. Known to cause: learning disabilities, effects on behaviour.
Lead is a Block P, Period 6 element, while oxygen is a Block P, Period 2 element. Lead is a soft and malleable metal. The morphology of lead oxide nanoparticles is red or yellow crystalline solids. Lead oxide nanoparticles are graded as toxic and dangerous for the environment. The chemical properties of lead oxide nanoparticles are outlined in the following table. The physical properties of lead oxide nanoparticles are given in the following table. The thermal properties of lead oxide nanoparticles are provided in the table below.