| Element | Use in Electronics | Harmful Effects |
| Lead | Used primarily in Cathode Ray Tube(CRT) Monitors and TVs |
Extremely harmful to the human body. Damages central nervous system can cause retardation, seizures, high blood pressure, and damage to the kidneys and liver. Negatively effects child development. |
| Beryllium | Forms significant portions of electrical connectors and battery contacts | Long term exposure can be carcinogenic, especially for the lungs. Extreme exposure can lead to a potentially fatal condition known as Acute Beryllium Disease |
| Arsenic | Used in some integrated circuits and semiconductors. | Arsenic is a potent poison. Causes severe damage to the digestive tract. |
| Mercury | Can be found in batteries, switches and circuit boards. | Attacks both the endocrine system and the central nervous system Harmful to the mouth, Damages teeth and gums Risk of impairment in the neurological development of unborn fetuses |
| Antimony | Used in production of diodes and batteries. Pure form used in semiconductor production |
Toxic to humans similar to arsenic fatal in large doses |
| Cadmium | Used in soldering, semiconductors and chip resistors | Potentially carcinogenic Repeated exposure can damage the lungs, kidneys and liver |