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Meaning of neon-21 | Babel Free

Noun CEFR B1

Definitions

A rare stable isotope of neon, ²¹₁₀Ne, having ten protons and eleven neutrons; it amounts to less than 0.3% of the element in nature

uncountable

CEFR level

B1

Intermediate
This word is part of the CEFR B1 vocabulary — intermediate level.

See also

neon-22 neonacy Neonatal neonatal abstinence syndrome neonatal milk neonatality