Chapter 15: Elements and Periodicity - Group 4

Flashcards covering key vocabulary and concepts related to Group IV elements, their properties, bonding, and applications.

Group IV

The group of elements also referred to as Group IVA or Group 14, including carbon (C), silicon (Si), germanium (Ge), tin (Sn), and lead (Pb).

Allotropy

The phenomenon where an element can exist in different physical forms, as seen with carbon in diamond, graphite, and buckminsterfullerene.

Ionization energy

The energy required to remove an outer electron from an atom; decreases down Group IV due to increasing atomic radius.

Covalent bonds

Chemical bonds formed by sharing electron pairs between atoms, primarily seen in Group IV tetrachlorides.

Dative covalent bond

A type of bond formed when one atom donates a pair of electrons to another atom; important in the hydrolysis of Group IV tetrachlorides.

Inert pair effect

The phenomenon where the two s electrons in the valence shell of heavier elements become less involved in bonding, resulting in more stable +2 oxidation states.

Oxidation states

The charge of an atom in a compound; Group IV elements typically show +2 and +4 oxidation states.

Acid/base nature of oxides

Refers to how oxides react with acids and bases; CO2 and SiO2 are acidic, while GeO2, SnO2, and PbO2 exhibit amphoteric behavior.

Silicates

Compounds that contain a silicon-bearing anion, typically represented by the silicate ion SiO4, which forms various structural arrangements.

Ceramics

Heat-resistant, non-metallic, inorganic solids made from metallic and non-metallic compounds; categorized into traditional and advanced ceramics.