Practice Quiz

MCAS Chemistry Exam Practice

Category - Chemistry

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Atoms of element A and atoms of element B react to form a compound. In the reaction, the radius of each atom of element A is decreased. Which of the following explains this decrease in atomic radius in the reaction?
  1. The atoms of element A lose electrons to atoms of element B.
  2. The atoms of element A gain neutrons from atoms of element B.
  3. Nuclear particles are converted into energy in atoms of element A.
  4. Protons become more densely packed in the nuclei of element A atoms.
Explanation
Answer: A - The atoms of element A lose electrons to atoms of element B.
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