Question 1 Explanation_Digital SAT Reading and Writing Practice Test 14

Mark for Review

Which finding, if true, would most directly challenge the validity of Dalton's atomic theory?

Some chemical reactions can be explained by a different model, not involving atoms.

Dalton's atomic theory was initially met with skepticism by the scientific community.

A newly discovered element consists of atoms with varying masses, contrary to Dalton's proposition.

The concept of atoms predates Dalton, with mentions in ancient Greek texts.

Correct Answer: C

Your Answer:

Explanation

Explanation: C: 'A newly discovered element consists of atoms with varying masses, contrary to Dalton's proposition.' is the correct answer because it directly contradicts one of the key ideas of Dalton's atomic theory, which claims that elements are composed of identical atoms with unique masses.