proton number
Pronunciation
Noun
B2 Upper-intermediate
Quick answer
The number of protons in the nucleus of an atom, which determines what chemical element it is.
Synonyms and antonyms
Synonyms
atomic number
Test yourself
Which word fits the gap? "Every atom of carbon has a _____ of six."
Answer: proton number
In your own words, what does "proton number" mean?
The number of protons in the nucleus of an atom, which determines what chemical element it is.
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