Examlex
All of the following students are participating in extracurricular activities EXCEPT
Iron
A chemical element with symbol Fe, known for its role in biological processes such as oxygen transport in hemoglobin and as a component of many enzymes.
Chlorine
A chemical element with symbol Cl and atomic number 17, a reactive halogen that is used as a disinfectant and in the manufacture of a wide range of products.
Sodium
A chemical element with symbol Na and atomic number 11, known for its role in nerve impulse transmission and muscle contraction.
Covalent Compound
A compound in which atoms are held together by covalent bonds; covalent compounds consist of molecules. Compare with ionic compound.
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