The lattice is one of the five two-dimensional lattices in which the lattice vectors a and b are equal and the gamma angle between them is arbitrary
O square
O oblique
O rhombic
O hexagonal
O rectangular

indium, and thallium have three electrons i think

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.