Exam (elaborations)
Science NLN practice questions
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To be isotopes, two atoms of the same element must have a different number of (A) neutrons. (B) protons. (C) electrons. (D) quarks. - Answer- (A) neutrons. Depending on its environment, a substance that can act as either an acid or a base is described as (A) amphoteric. (B) an isomer. (...
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