NM meaning in Chemistry ?

Answer: What is Non-metal mean?

In chemistry, a nonmetal is a chemical element that usually gains one or more electrons when reacting with a metal and forms an acid when combined with oxygen and hydrogen. At room temperature about half are gases, one (bromine) is a liquid, and the rest are solids. Most solid nonmetals are shiny, whereas bromine is colored, and the remaining gaseous nonmetals are colored or colorless. The solids are either hard and brittle or soft and crumbly, and tend to be poor conductors of heat and electricity and have no structural uses (as is the case for nonmetals generally).

There is no universal agreement on which elements are nonmetals; the numbers generally range from fourteen to twenty-three, depending on the criterion or criteria of interest.

Different kinds of nonmetallic elements include, for example, (i) noble gases; (ii) halogens; (iii) elements such as silicon, which are sometimes instead called metalloids; and (iv) several remaining nonmetals, such as hydrogen and selenium. The latter have no widely recognised collective name and are hereafter informally referred to as "unclassified nonmetals". Metalloids have a predominately (weak) nonmetallic chemistry. The unclassified nonmetals are moderately nonmetallic, on a net basis. Halogens, such as bromine, are characterized by stronger nonmetallic properties and a tendency to form predominantly ionic compounds with metals. Noble gases such as xenon are distinguished by their reluctance to form compounds.

The distinction between different kinds of nonmetals is not absolute. Boundary overlaps, including with the metalloids, occur as outlying elements among each of the kinds of nonmetals show or begin to show less-distinct, hybrid-like, or atypical properties.

Although five times more elements are metals than nonmetals, two of the nonmetals—hydrogen and helium—make up about 99% of the observable universe by mass. Another nonmetal, oxygen, makes up almost half of the Earth's crust, oceans, and atmosphere.

Nonmetals largely exhibit a breadth of roles in sustaining life. Living organisms are composed almost entirely of the nonmetals hydrogen, oxygen, carbon, and nitrogen. A near-universal use for nonmetals is in medicine and pharmaceuticals.

reference

Full Form	Category
nanoMolar	Academic & Science
Net Margin	Accounts and Finance
Not Meaningful	Accounts and Finance
Normal Metal	Chemistry
Non-metal	Chemistry
Nanometer	Computer and Networking
Network Management	Computer and Networking
No Mark	Computer Assembly Language
Net Manager	Computer Technology
New Mexico	Country Specific
Noise Margin	Electronics
No Message	Email
NAIMISHARANYA	Indian Railway Station
Not much	Internet Slang
News Manager	Jobs
New Material	Jobs
Novice Middle	Jobs
Negative Medium	Maths
Nearest Mean	Maths
Non-monotonic	Maths
Non-markovian	Maths
Number Machine	Maths
No Meaning	Maths
Not Measurable	Maths
New Mapset	Maths
Nonlinear Model	Maths
Number Metric	Maths
Normalized Minutes	Measurement Unit
Newton Meter	Measurement Unit
Nemaline Myopathy	Medical
NeuroMelanin	Medical
Nuclear Medicine	Medical
Never Married	Messaging
No Matter	Messaging
Nothing Much	Messaging
New Messages	Messaging
Never Mind	Messaging
Not Marked	Military and Defence
Not Misclassified	Military and Defence
Networked Media	Networking
Newton Metre	Physics Related
No Motion	Physics Related
Non-magnetic	Physics Related
Non-moment	Physics Related
Non-mechanical	Physics Related
Nano Modified	Physics Related
No Mass	Physics Related
Not Modulated	Radio Science
Navi Mumbai	Regional
Inner Mongolia	Regional
Network Manager	Space Science
Non-metallic	Space Science
National Match	Sports
National Master	Sports & Games
Air Madrid	Transport & Travel
Mount Cook Airline	Transport & Travel