science quizbee

• Radon is usually a gas, but when it’s frozen it turns to a glowing red.
• ֍ Actinium glows a pale blue in a dark room.
• ֍ Radium famously glows green in the dark.
• ֍ In nuclear physics, a blue glow is produced when charged particles are emitted by the reactor. This is called Cherenkov radiation
• You’re made of salt! There’s about 200 grams of salt in the average adult human body. Sodium helps your body retain water, which you need to stay healthy.
• One thing that is “lighter than air” is helium. This gas is commonly put into balloons, and that’s why they float – they’re literally lighter than the air around them.
• Alchemy is an older version of chemistry. Alchemists were people who mixed substances together to try and create magical potions.
• Metal can be liquid. Mercury is a metal, and when it’s kept at room temperature, it turns into a liquid. Mercury used to be in glass thermometers, but since it’s dangerous for people to touch so most countries don’t use mercury thermometers in medicine anymore.