Multiple Choice
What occurs when a sodium ion (Na+) is attracted to a chloride ion (Cl-)?
2. Atoms & Elements
Ions
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When are anions formed?
A
When an atom shares electrons
B
When an atom loses electrons
C
When an atom gains electrons
D
When an atom gains protons
Verified step by step guidance1
Understand the concept of ions: Ions are atoms or molecules that have gained or lost electrons, resulting in a net electrical charge.
Differentiate between cations and anions: Cations are positively charged ions formed when an atom loses electrons, while anions are negatively charged ions formed when an atom gains electrons.
Focus on anions: Anions are formed when an atom gains electrons, increasing the number of negatively charged particles compared to positively charged protons.
Consider electron configuration: When an atom gains electrons, it moves towards a more stable electron configuration, often achieving a full outer shell similar to noble gases.
Review examples: Common anions include chloride (Cl-), sulfate (SO42-), and nitrate (NO3-), which are formed by gaining electrons.
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