A. Single unpaired electron in an outer orbit
B. Single paired electron in an outer orbit
C. Double unpaired electron in an outer orbit
D. Double paired electron in an outer orbit

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Related Mcqs:

  1. Generation of free radicals occurs by all of the following mechanism EXCEPT_____________?
    A. Normal metabolism B. Oxygen toxicity C. Reperfusion after ischemic injury D. All of the above...
  2. Free radicals can be inactivated by the following enzymes EXCEPT__________________?
    A. Glutathione peroxidase B. Catalase C. Superoxide dismutase D. Myeloperoxidase...
  3. IN occlusion, the teeth have______________?
    A. Cusp – to – cusp contact B. Edge- to – edge contact C. Marginal contact D. Surface – to- surface contact...
  4. The most frequently encountered clostridial species in gas gangrene is______________?
    A. Clostridium botulinum B. Clostridium welchii C. Clostridium tetani D. Clostridium difficile...
  5. Bacterial species which is protective or beneficial to the host is_______________?
    A. Streptococcus sanguis B. Porphyromonas gingivalis C. Treponema denticola D. Spirochetes...
  6. Same or closely related antigens present in different biological species are known as________________?
    A. Suquestrated antigens B. Isoantigens C. Haptens D. Heterophile antigens...
  7. The attachment of the Actinomyces species to the tooth surface is facilitated by____________?
    A. Fimbriae B. Cilia C. Flagella D. Pseudopodia...
  8. A material that speeds up a chemical reaction without chemically becoming involved is called_____________?
    A. A solvent B. A base C. A catalyst D. Thermoplastic...
  9. Adipose tissue releases free fatty acids in the________________?
    A. Fasting state B. Resting state C. Active state D. All of the above...
  10. The chemical used to etch enamel is_______________?
    A. Zinc oxide B. Methyl methacrylate C. Phosphoric acid D. Eugenol...
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