proton

proton — noun

1. a positively charged particle found inside the nucleus of every atom; together w

1.名詞B2
釋義

a positively charged particle found inside the nucleus of every atom; together with neutrons, it forms the core of an atom.

例句

The number of protons in an atom decides its element; hydrogen has just one.

collocation: the number of protons determines the element

Dr. Chen explained that protons carry a positive charge while electrons carry a negative one.

contrast: proton positive vs electron negative

反義詞
  • electron

    carries a negative electric charge of equal magnitude but opposite sign

文法句型

the number of + proton

proton + noun (as modifier)

用法筆記

Frequently paired with neutron and electron when describing atomic structure. The pattern 'number of protons' is the standard way to refer to an element's atomic number. In medical contexts, proton therapy uses high-energy protons to treat certain cancers.

常見錯誤

❌A proton has a negative charge.
✅A proton has a positive charge.
💡Protons are positively charged; electrons carry the negative charge.
❌The number of neutrons decides which element an atom is.
✅The number of protons decides which element an atom is.
💡The element is identified by its proton count (atomic number), not its neutron count.