An ion is defined as:

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Prepare for the NRCan XRF Analyzer Operator Certification Level 1 Exam. Utilize flashcards and multiple-choice questions with detailed hints and explanations. Ready yourself for a successful examination!

Multiple Choice

An ion is defined as:

Explanation:
An ion is an atom or group of atoms that carries a net electric charge because it has gained or lost electrons. When electrons are removed, the species becomes positively charged; when electrons are added, it becomes negatively charged. This can involve a single atom (a monatomic ion) like Na+ or Cl−, or a group of bonded atoms with a net charge (polyatomic ion) like SO4^2− or NH4+. A neutral atom or neutral molecule has no net charge, so it is not an ion. A bare nucleus without electrons isn’t the usual chemical use of an ion. So the defining idea is the net charge arising from electron transfer.

An ion is an atom or group of atoms that carries a net electric charge because it has gained or lost electrons. When electrons are removed, the species becomes positively charged; when electrons are added, it becomes negatively charged. This can involve a single atom (a monatomic ion) like Na+ or Cl−, or a group of bonded atoms with a net charge (polyatomic ion) like SO4^2− or NH4+. A neutral atom or neutral molecule has no net charge, so it is not an ion. A bare nucleus without electrons isn’t the usual chemical use of an ion. So the defining idea is the net charge arising from electron transfer.

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