What is the atomic mass of neon?
Quick Answer
The atomic mass of the element neon is 20.18 amu, or atomic mass units. This number, which appears on the periodic table underneath the chemical symbol for neon, Ne, represents the weighted average of the isotopic masses of neon's isotopes based on their abundance in nature.
Continue ReadingFull Answer
Three stable isotopes of neon exist in nature: Ne-20, Ne-21 and Ne-22. Their respective isotopic masses are 19.99 amu, 20.99 amu and 21.99 amu, rounded to two decimal places. There are also 16 known radioactive isotopes of neon, all with short half-lives of 1 minute or less except for Ne-24, which has a half-life of 3.38 minutes.
Neon has an atomic number of 10, meaning that one atom of neon contains 10 protons and 10 electrons. Each neon atom also contains 10 neutrons. It has a melting point of -248.6 degrees Celsius and a boiling point of -246.1 degrees Celsius. At 293 degrees Kelvin, neon has a density of 0.90 grams per cubic centimeter.
Neon is one of the six noble gases listed under group 18 of the periodic table. The other five noble gases are helium, argon, krypton, xenon and radon. These elements do not typically form compounds with other elements because their atoms are already stable, possessing full outer electron shells.
Learn more about Atoms & MoleculesRelated Questions
-
Q:
How did the element neon get its name?
A: The element neon received its name, which is Greek for "new," when it was first discovered in 1898. It was first discovered and named by Sir William Ramsey... Full Answer >Filed Under: -
Q:
What is the mass number of aluminum?
A: The atomic mass of aluminum is 26.981539 amu and the atomic number of aluminum is 13. This light, grey metal is able to resist corrosion which makes it ide... Full Answer >Filed Under: -
Q:
What is the atomic mass of sodium?
A: Sodium is a metallic element on the periodic table with an atomic number of 11 and an atomic mass of 22.98 amu. This atomic mass is calculated by adding to... Full Answer >Filed Under: -
Q:
What is 1/12 the mass of a carbon-12 atom?
A: The atomic mass unit, or amu, is 1/12 the mass of one atom of carbon-12. An atomic mass unit has the mass of 1/(6.0221415 * 10^23) grams. Full Answer >Filed Under:
