An ion is formed when an atom
AAdds an extra shell of electrons
BGains a neutron in its nucleus
CLoses a proton from its nucleus
DGains or loses one or more electrons
Answer & Solution
Correct answer: D. Gains or loses one or more electrons
1. Atoms are electrically neutral overall.
2. When an atom loses electrons it becomes a positive ion (cation).
3. When it gains electrons it becomes a negative ion (anion).
4. So option A is correct.
_Source: Selina Concise Chemistry Class 8, Ch on Structure of Atom (Mistral OCR'd PDF), section on ions_
Related questions
An electron and a proton have the same kinetic energy. Which has the larger de Broglie wavHund's rule states that for degenerate orbitals of a subshell, electronsThe Aufbau principle states that electrons fill atomic orbitalsThe four quantum numbers (n, l, m_l, m_s) fully specify an electron in an atom. The magnetHeisenberg's uncertainty principle statesThe de Broglie wavelength associated with a particle of mass m and velocity v isFor a hydrogen-like ion of atomic number Z, the energy of the nth level isThe relationship E = hν (Planck) between photon energy and frequency contains constant h t