Examlex
The iframe element is more commonly used on the Web; but if you are writing code in compliance with the strict application of XHTML,the ____ element should be used.
Chlorine Atom
A chemical element with symbol Cl and atomic number 17, known for its roles in various chemical reactions and compounds.
Neutrons
Neutral particles found in the nucleus of an atom, contributing to the atom's mass but not its charge.
Protons
Positively charged subatomic particles found in the nucleus of an atom.
Amu
Atomic Mass Unit, a unit of mass used to express atomic and molecular weights, equivalent to one twelfth of the mass of a carbon-12 atom.
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