Question

What is meant by monomeric trihalides?

Answer 1

Answer:

Monomeric trihalides belongs to third group. Monomer is a molecule that may bind chemically or supramolecularly to other molecules to form a (supramolecular) polymer. 3.0

Explanation:

Answer 2

Monomeric trihalides

Explanation:

• Monomer trihalide generally belong to third group. For example $AlCl_3$  is a monomer trihalide which dimerize to give $Al_2Cl_6$ .
• In terms of chemical behavior, and trends going down group 3 for properties such as melting point, electronegativity and ionic radius, scandium, yttrium, lanthanum and actinium are similar to their group 1–2 counterparts.  
• The four group 3 elements are scandium, yttrium, lanthanum and actinium. “lanthanide” refers to the elements between lanthanum and lutetium.

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