Zadanie 2a
Wzorowane na: Chemistry HL Paper 2, May 2023, TZ1, pytanie 2(a). Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Polecenie
(i) Annotate and label the ground state orbital diagram of carbon below, using arrows to represent electrons.
![empty orbital diagram template: the label [He] followed by one empty box, a gap, then three empty boxes, with a line for the orbital label under each group of boxes](/figury/ib-chemia-hl-2023-maj-tz1-p2/ib-chemia-hl-2023-maj-tz1-p2-z2a-f1.svg)
(ii) Sketch the shapes of the two types of occupied orbital identified in part (i) on the axes below, and state the orbital type for each.
Sprawdź rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
(i) 2s box: one up arrow and one down arrow; 2p boxes: one up arrow in each of two different boxes «parallel spins», third box empty; boxes labelled 2s and 2p ✔
(ii) s orbital: a sphere centred on the origin, labelled s ✔
p orbital: a dumbbell of two lobes along one axis with the node at the origin, labelled p ✔
Schemat punktowania
(i) [1]: arrows and both labels required; the two 2p electrons must be unpaired in separate boxes (Hund's rule). Accept 'hooks' for arrows. (ii) [2]: M1 for the shape and label of the s orbital, M2 for the p orbital. px, py or pz may be drawn. M2 cannot be awarded if the orbital labels are missing or wrong; the node of the p orbital must be at the origin.