Zadanie 13
Wzorowane na: Chemistry HL Paper 1, May 2024, TZ2, pytanie 13. Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
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Polecenie
Which statement best explains why a block of copper can be hammered into a thin sheet without breaking?
A. Cations in neighbouring layers repel one another, so they stay fixed in their positions
B. Layers of cations can slide over one another because the metallic bond is non-directional, and the delocalized electrons still hold the cations together
C. Delocalized electrons form localized covalent bonds that break and re-form between the layers
D. Cations and anions in the lattice swap places when the metal is hit
Sprawdź rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
B ✔
«the metallic bond is the attraction between cations and a sea of delocalized electrons, and it acts in all directions; when the layers move past one another the electrons still surround the cations, so the metal deforms instead of breaking»
Schemat punktowania
One mark for the correct option.