Name given because they don’t interact with “common” elements. However, some have recently been discovered to interact with other elements Colorless, odorless, and tasteless Full valence electron shells (making forming compounds difficult) Very low boiling and melting points Have many different applications
Comes from Greek helios meaning ‘the sun’ Emits purple-orange light Second lightest and second most abundant element in the universe. Lowest boiling and melting point of any element. Used in cryogenics, flight, and filling balloons. The speed of sound in helium is 3x of that in regular air, making your voice sound higher than normal when inhaled.
Means ‘new’ in Greek Most intense light discharge of all noble gases. Emits bright red color Widely used in signs and lights. Once used to make television tubes.
Comes from Greek argos meaning lazy, due to not reacting at all with other elements Emits blue-green light Third most common element in Earth’s atmosphere Used in arc welding, lighting, and scuba diving equipment
Comes from Greek kryptos meaning ‘hidden’ Emits light orange-white color Length of a meter was once based on light emitted from excited Krypton atoms Used in many different lights and lasers Considered a non-toxic asphyxiant, large quantities will replace oxygen
Means ‘stranger’ in Greek Emits a bright blue-lavender glow Used in plasma TVs, lasers, and as an anesthetic Speed of sound is lower, causing the opposite effect of helium Considered safe but still risky, as it has the potential to cause asphyxiation if too much is inhaled
Named after radium, as it is radioactive Emits phosphorescent (glow in the dark) yellow only when cooled to extreme temperatures Heaviest of all noble gases and one of the heaviest gases at room temperature Once used for medical purposes, stopped when revealed it was radioactive Is a carcinogenic gas and considered a public health risk