Because it is chemically inert, it is also used as a gas shield in robotic arc welding and as a non-reactive atmosphere for growing silicon and germanium crystals used to make electronic semiconductor devices. Liquid helium is often used to provide the extremely low temperatures required in ...
How reactive are halogens? How to separate noble gases from air How a potassium atom can attain a noble gas configuration? Why is neon an unreactive monatomic gas? Who discovered tellurium? Why is helium inert? Write the complete electron configuration for the argon atom. ...
Which element is more reactive, Iodine or Astatine? In what phase is Venus closest to Earth? If the Sun were to contract and become a black hole, (a) what would its approximate radius be, and (b) by what factor would its density increase? What causes an element to break ...
Derived from the terms "excited" and "dimers," these types of lasers use reactive gases, such as chlorine and fluorine, mixed with inert gases such as argon, krypton or xenon. When electrically stimulated, a pseudo molecule (dimer) is produced. When lased, the dimer produces light in the...
Why? The speed of sound relates to compressibility and flow of a fluid, which is a function of its temperature, pressure and composition -- in this case, a hydrogen-helium atmosphere at a temperature of around 800 K (980 F, or 527 C) [sources: Fletcher]. Read More Hypersonic: Don'...
GMAW, also known as metal inert gas (MIG) welding,uses a continuously fed wire electrode that melts and forms the weld pool. The shielding gas can be either inert or active. Inert gases are non-reactive gases such as argon and helium. Active gases are reactive gases such as carbon dioxide...
Alternatively, you could go by periods (rows) instead and go from the first, which is just hydrogen and helium, down to the Lanthanides and Actinides that hover below the rest of the table. Breaking the table up like this makes the elements less daunting to memorize and will help make as...
Inert gases are non-combustible, non-flammable, and non-reactive to many materials. Examples includeargon, helium, nitrogen, and neon. Which is non-combustible substance? Answer: Non - combustible Substance = Substances likestone, glass, iron nails, etc. do not burn on being exposed to flame...
Prevention of these is important for bladder healing. We studied the influence of photosensitizer concentration, irradiation parameters, and production of reactive oxygen species (ROS) on the photodynamically induced damage in the porcine urothelium invitro. The aim was to determine the threshold ...
Helium (He) - nonmetal. Oxygen (O) - nonmetal. Neon (Ne) - nonmetal. Nitrogen (N) - nonmetal. Carbon (C) - reactive nonmetal. Silicon (Si) - metalloid. Magnesium (Mg) - alkaline earth metal. What are the first 18 elements?