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Section 11.1.1.2

Uncountable (Mass) Nouns

Uncountable (mass) nouns refer to substances, concepts,or general terms for classes of items. The following words are uncountablenouns: oxygen (substance), education (concept),equipment (general term).

Do not use an article with an uncountable noun ifyou are referring to the noun in a general sense.


Unacceptable

Marie and Pierre Curie discovered the radioactivity in1898.

Acceptable

Marie and Pierre Curie discovered radioactivity in 1898.


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## Uncountable (Mass) Nouns ##
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