Atoms cannot be divided using chemicals. They do consist of parts, which include protons, neutrons, and electrons, but an atom is a basic chemical building block of matter.

Some of the duties of a chemist could be:

• Analyze, synthesize, purify, modify and characterize chemical or biochemical compounds
• Develop and conduct programs of analysis to ensure quality control of raw materials, chemical intermediates or final products
• Conduct programs of sample and data collection and analysis to identify and quantify environmental toxicants
• Conduct research to develop new chemical formulations and processes and devise new technical applications of industrial chemicals and compounds
• Conduct research to discover, develop and refine, and evaluate new products
• Conduct fundamental and applied research into the synthesis and properties of chemical compounds and the mechanisms of chemical reactions
• Investigate chemical aspects of the mechanisms of drug action, the diagnosis and treatment of disease, organ function and the assessment of health
• Participate in interdisciplinary research and development projects working with chemical engineers, biologists, microbiologists, agronomists, geologists or other professionals
• Act as technical consultant in a particular field of expertise
• May participate in the commercialization of new products
• May supervise other chemists and chemical technicians and technologists.

Being aware of the risk involved in a job you are working in is considered part of the job. The drawbacks of working in chemical manufacturing unit could be:

 Manufacturing chemicals usually is a continuous process; this means that, once a process has begun, it cannot be stopped when it is time for workers to go home. Split, weekend, and night shifts are common.

The plants usually are clean, although the continually running machines sometimes are loud and the interior of many plants can be hot.

Hardhats and safety goggles are mandatory and worn throughout the plant.

Hazards in the chemical industry can be substantial, but they generally are avoided through strict safety procedures. Workers are required to have protective gear and extensive knowledge of the dangers associated with the chemicals being handled. Body suits with breathing devices designed to filter out any harmful fumes are mandatory for work in dangerous environments.

Both blood and urine samples for the following classes or families of drugs in  drug screening test

• amphetamine/methamphetamine - stimulants such as methamphetamine (crank, ice), amphetamine, and methylenedioxymethamphetamine (MDMA, Ecstasy)
• barbiturates - sedatives such as butalbital (Fiorinal), phenobarbital, and pentobarbital (sodium pentothal)
• benzodiazepines - tranquilizers such as diazepam (Valium) and alprazolam (Xanax)
• cannabinoids - active chemicals in marijuana
• cocaine metabolite - cocaine and its related metabolites
• opiates - narcotic analgesics derived from opium such as codeine, morphine, heroin, oxycodone, and hydrocodone
• phencyclidine - also know as PCP or angel dust