alleryStart learning →An ion is formed when an atom:
ASplits in half
BGains or loses protons
CGains or loses neutrons
DGains or loses electrons
Answer & Solution
Correct answer: D. Gains or loses electrons
1. Ions carry a net electric charge.
2. Atoms become ions by changing their electron count.
3. Losing electrons gives a cation (positive ion).
4. Gaining electrons gives an anion (negative ion).
5. The nucleus (protons and neutrons) is normally unchanged.
_Source: Selina Concise Chemistry ICSE Class 9, Ch 4 'Atomic Structure'_
Keep practising Atomic Structure
Browse all Atomic Structure questions for ICSE Class 9, or explore more Chemistry topics.
Related questions
Which sub-particle was discovered LAST?If an element has the configuration 2, 8, 8, 1, its valency and likely group are:Why does the atomic mass of chlorine (35.5) lie between two integers?An atom of oxygen has Z = 8 and A = 16. Number of neutrons is:Why are protons and neutrons together called nucleons?Isotopes of hydrogen include:Chlorine (Z = 17) becomes Cl- by gaining how many electrons?Magnesium (Z = 12) forms Mg^2+ by losing how many electrons?