noble gas n. Any of the elements in Group 18 of the periodic table, including helium, neon, argon, krypton, xenon, and radon, which are monatomic and with limited exceptions chemically inert. Also calledrare gas. American Heritage® Dictionary of the English Language, Fifth Edition. Copyright...
The meaning of NOBLE GAS is any of a group of rare gases that include helium, neon, argon, krypton, xenon, and usually radon and that exhibit great stability and extremely low reaction rates —called also inert gas.
The meaning of NOBLE GAS is any of a group of rare gases that include helium, neon, argon, krypton, xenon, and usually radon and that exhibit great stability and extremely low reaction rates —called also inert gas.
Noble gas definition: any of the chemically inert gaseous elements of group 8A or 0 of the periodic table. See examples of NOBLE GAS used in a sentence.
we can make predictions about their melting and boiling points. The element with the lowest boiling point and melting point is at the top of group, helium, and as you move down the groups their melting and boiling points increase. Therefore, the noble gas with the highest melting or boiling...
1. Possessing hereditary rank in a political system or social class derived from a feudalistic stage of a country's development. 2. a. Having or showing qualities of high moral character, such as courage, generosity, or honor: a noble spirit. b. Proceeding from or indicative of such a ...
Other elements exist as gases at STP but as monatomic noble gases. A gas is monatomic when it is comprised entirely of one kind of atom, not bonded within any molecules. This contrasts with diatomic gases, which have their atoms bonded in pairs. Monatomic noble gases include the following el...
Find out which words work together and produce more natural-sounding English with the Oxford Collocations Dictionary app. Try it for free as part of the Oxford Advanced Learner’s Dictionary app.[uncountable] a particular type of gas or mixture of gases used as fuel for heating and cooking...
Lithium atoms have 3 electrons, meaning they have electrons in two shells: 2 in the first shell and 1 in the second. By losing an electron to become a cation, lithium gets a stable electron arrangement, identical to that of the noble gas helium. ...
noble wine b : very good or excellent See that there be a noble supper provided …R. B. Sheridan 4 : grand or impressive especially in appearance noble edifice a noble cathedral 5 : possessing, characterized by, or arising from superiority of mind or character or of ideals or moral...