Which one of the following ions has more electrons than protons and more protons than neutrons?
Correct answer: C. H-
- A. D
- B. d-
- C. H-
- D. He
Explanation
H is Hydrogen, it's proton number is 1 so it has 1 proton, 1 electron and no neutrons. The ion of H gains an electron to attain the negative charge so now it has 2 electrons, 1 proton and 0 neutrons
This question appeared on the ETEA MDCAT 2019 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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