Question
A single-displacement reaction occurs when ____.
Answer
A single-displacement reaction occurs when an atom or ion in a compound is replaced by an atom or ion of another element.
Note: For example, solid copper metal will displace silver ions in a clear solution of silver nitrate to form a blue copper nitrate solution and solid silver metal.
Note #2: Ag in AgNO3 has an oxidation state of +1, but when it leaves the compound, it gains one electron (the Ag+ is reduced to Ag). On the other hand, copper loses an electron (oxidation) when it joins the nitrate ion.
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Formula unit represents ____.
____ represents the empirical formula of an ionic compound, since they do not form true molecules, rather a coordinated lattice.
____ weight is the term used for ionic compounds "molecular" weight as no molecule actually exists, its just a lattice structure.
____ compounds form from elements of similar electronegativity.
Atomic weight is ____.
____ is a weighted average of the masses of the naturally occurring isotopes of an element, not their weights.