Zadanie 3c
When sodium burns in excess oxygen, the main product is sodium peroxide, Na2O2. Determine the percentage covalent character and the bonding type in sodium peroxide using sections 9 and 17 of the data booklet.
The bonding triangle: ionic, covalent, metallic
Describe bonding as a continuum between ionic, covalent and metallic models rather than three separate categories, represent it on the bonding triangle, and use the appropriate bonding model to explain the properties of a given material.
Tę umiejętność sprawdzają 3 zadania wzorowane na arkuszach IB z lat 2022–2025.
Zadania sprawdzające tę umiejętność: 3 Otwórz w wyszukiwarce z filtrami
Zadanie 3a
Chromium(III) oxide, Cr2O3, is a hard ceramic used as an abrasive and as a wear-resistant coating. Outline the bonding in chromium(III) oxide and its electrical conductivity in the solid state. Use sections 9 and 17 of the data booklet.
Zadanie 10
What is the type of bonding in a solid that is brittle, has a high melting point, does not conduct electricity when solid but conducts when molten? A. Ionic B. Molecular covalent C. Metallic D. Giant covalent