) Complete the following information about charge & are located charge & are located charge & are located have a have a have a O How many valence electrons does Nitrogen have? (image on right) What is a chemical compound? Describe the difference between an ionic and covalent bond. 21) What is the mass number of Sulfur? 22) What is the atomic number of Sulfur? 23) How many protons would an atom of Sulfur have? 24) How many electrons would an atom of Sulfur have? 91 Sulfur 32.07

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Environmental health and hazards

An organism's environment is the environment in which it lives and has an impact on its well-being. The World Health Organization (WHO) defines environmental health as "those aspects of public health, such as quality of life, that are influenced by physical, chemical, biological, social, and psychosocial components in the environment." Environmental health is concerned with both natural and man-made settings in order to enhance public health. Environmental science, occupational medicine, toxicology, and epidemiology are the key subdisciplines of environmental health.