Transition and Non-Transition Metals: Formulas, Cations, Anions, and Compound Names

Transition and Non-Transition Metals

Overview

This section reviews the identification and classification of compounds containing transition and non-transition metals. Students are expected to recognize chemical formulas, determine the cations and anions present, and correctly name the compounds according to IUPAC nomenclature.

Key Concepts

• Cation: A positively charged ion, typically a metal in ionic compounds.

• Anion: A negatively charged ion, often a nonmetal or polyatomic ion.

• Transition metals: Elements found in the d-block of the periodic table, often forming ions with variable charges.

• Non-transition metals: Metals not in the d-block, usually with fixed charges.

• IUPAC Nomenclature: Systematic method for naming chemical compounds, including the use of Roman numerals for transition metals with variable oxidation states.

Compound Classification Table

The following table summarizes the formulas, cations, anions, and names of selected compounds involving transition and non-transition metals.

Formula	Cation	Anion	Name
CsI	Cs+ (Cesium)	I- (Iodide)	Cesium iodide
Ba3(PO4)2	Ba2+ (Barium)	PO43- (Phosphate)	Barium phosphate
PbBr2	Pb2+ (Lead(II))	Br- (Bromide)	Lead(II) bromide
TiO2	Ti4+ (Titanium(IV))	O2- (Oxide)	Titanium(IV) oxide
Ca(OH)2	Ca2+ (Calcium)	OH- (Hydroxide)	Calcium hydroxide

Additional Information

• Transition metals (e.g., Pb, Ti) often require Roman numerals in their names to indicate oxidation state.

• Non-transition metals (e.g., Cs, Ba, Ca) typically have a single common charge and do not require Roman numerals.

• Polyatomic ions such as phosphate (PO43-) and hydroxide (OH-) are common in inorganic compounds.

Examples and Applications

• Cesium iodide (CsI): Used in scintillation detectors and medical imaging.

• Barium phosphate (Ba3(PO4)2): Found in ceramics and glass manufacturing.

• Lead(II) bromide (PbBr2): Used in laboratory synthesis and as a precursor for other lead compounds.

• Titanium(IV) oxide (TiO2): Widely used as a pigment in paints and sunscreens.

• Calcium hydroxide (Ca(OH)2): Used in construction (lime), water treatment, and food processing.

Formulas and Equations

• General formula for ionic compounds:

$\text{M}^{n+} + \text{X}^{m-} \rightarrow \text{M}_x\text{X}_y$

• Charge balance: The total positive charge from cations must equal the total negative charge from anions in the formula.