Zadanie 7
Wzorowane na: Chemistry SL Paper 1A, May 2026, TZ3, pytanie 7. Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Polecenie
Which statement about diamond, carbon dioxide and silicon dioxide is correct?
A. The central atoms in carbon dioxide and in silicon dioxide have the same electron domain geometry
B. Diamond and carbon dioxide both have high melting points
C. Diamond and silicon dioxide both have covalent network structures with tetrahedral electron domain geometry around the central atom
D. Silicon dioxide has a low melting point because it consists of discrete molecules
Sprawdź rozwiązanieUkryj rozwiązanieKlucz CKE i punktacja
Odpowiedź z klucza
C ✔
«in diamond each carbon atom has four bonding domains and in silicon dioxide each silicon atom has four bonding domains, so both are tetrahedral covalent network structures»
Schemat punktowania
1 mark for the correct option.
Komentarz
Carbon dioxide is linear and molecular, whereas silicon dioxide is a tetrahedral network.