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Вопрос 119

An atom becomes an ion through ordinary electron loss. Which statements about what changes are correct? Select all that apply.

  1. Its proton count changes.
  2. Its electron count changes.Правильный ответ
  3. Its mass number changes.
  4. Its isotope identity stays the same.Правильный ответ

Объяснение

Ordinary ion formation changes the number of electrons and therefore the net charge, while leaving the nucleus intact. Proton or neutron changes would alter nuclear identity or isotope information, not merely ionize the atom.

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