The paramagnetic nature of the substance depend on;
Correct answer: C. The number of unpaired electrons
- A. The number of electrons in the outermost shell
- B. The number of electrons that are easily ejected
- C. The number of unpaired electrons
- D. The number of lone pair electrons
Explanation
A paramagnetic substance is one that is weakly attracted by a magnetic field due to the presence of unpaired electrons in its atoms or molecules. The unpaired electrons have a magnetic moment, which causes the substance to be attracted to an external magnetic field. Therefore, the correct answer is that the paramagnetic nature of a substance depends on the number of unpaired electrons. When all the electrons in an atom or molecule are paired, the substance is diamagnetic and is not attracted to a magnetic field.
This question appeared on the ETEA MDCAT 2009 paper, which you can sit online with every answer explained.
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About Electronic Configuration
Electronic configuration describes how electrons occupy shells, subshells and orbitals around an atom. Questions use the Aufbau principle, Pauli exclusion principle and Hund's rule to write configurations, identify valence electrons, form ions and explain periodic trends, including common exceptions such as chromium and copper.
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