isoelectronic

[ahy-soh-i-lek-tron-ik, -ee-lek-]

i·so·e·lec·tron·ic

[ahy-soh-i-lek-tron-ik, -ee-lek-]
adjective Physics, Chemistry.
1.
noting or pertaining to atoms and ions having an equal number of electrons.
2.
noting or pertaining to atoms, radicals, or ions having either an equal number of electrons or an equal number of valence electrons.

Origin:
1925–30; iso- + electronic
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Isoelectronic is always a great word to know.
So is gravitational field. Does it mean:
the attractive effect of matter on other matter; the region surrounding an astronomical body in which the force of gravitation is strong
the splitting of the nucleus of an atom into nuclei of lighter atoms, accompanied by the release of energy
Collins
World English Dictionary
isoelectronic (ˌaɪsəʊɪlɛkˈtrɒnɪk)
 
adj
(of atoms, radicals, or ions) having an equal number of electrons or a similar configuration of electrons

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