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Zorluk: OrtaCommas with Nonessential and Parenthetical Elements

The following passage is about the development of the periodic table.

In 1869, the Russian chemist Dmitri Mendeleev published his first version of the periodic table. He organized the elements by their atomic masses, leaving gaps for elements that had not yet been discovered. The predicted elements, which Mendeleev described in detail were later isolated and found to match his predictions with remarkable accuracy.

Which choice best punctuates the underlined portion of the passage?

  1. A
    NO CHANGE
  2. elements, which Mendeleev described in detail,Cevap
  3. C
    elements, that Mendeleev described in detail,
  4. D
    elements; which Mendeleev described in detail,

Cevap

elements, which Mendeleev described in detail,
The clause 'which Mendeleev described in detail' is nonessential because the noun phrase it modifies, 'The predicted elements,' is already specific. Therefore, the clause must be enclosed by a pair of commas. The option containing a comma after both 'elements' and 'detail' is correct.

Adım Adım Çözüm

1
Identify the clause within the sentence structure.
The clause 'which Mendeleev described in detail' modifies 'predicted elements'.
Determining the boundary of the clause helps determine where punctuation is needed.
2
Determine if the clause is essential (restrictive) or nonessential (nonrestrictive).
The clause is nonessential because 'predicted elements' already clearly specifies which elements are being discussed; removing the clause does not change the core meaning of the sentence.
Nonessential elements must be set off with punctuation, whereas essential elements should not be punctuated.
3
Apply the correct punctuation rule for nonessential relative clauses.
The relative clause must be enclosed by a pair of commas (one before 'which' and one after 'detail').
Using a pair of commas correctly isolates the parenthetical information without interrupting the flow of the main sentence.

Anahtar Kavram

Nonessential (parenthetical) relative clauses must be set off by a pair of commas.
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Konular

Commas with Nonessential and Parenthetical Elements

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