neutron number

American  

noun

Physics.

1. the number of neutrons in the nucleus of an atom, equal to the mass number minus the atomic number of the atom. N

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neutron number British  

noun

1.  N.  the number of neutrons in the nucleus of an atom

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Etymology

Origin of neutron number

First recorded in 1950–55

Example Sentences

However, the neutron number 184 is still a long way from being reached, so the 30 seconds are only one step on the way.

From Science Daily

A more detailed analysis reveals that their lifetimes increase towards the magic neutron number 184.

From Science Daily

“Most reasonable models favour this proton and neutron number to be those that should give extra stability in the region,” says Rudolph.

From Nature

The neutron number would not have dropped if the bright surfaces were made of sulfur or silicates.

From New York Times