Zadanie 7
Wzorowane na: Chemistry SL Paper 1, November 2024, 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 statements about the organization of the elements in the periodic table are correct?
I. Elements with atomic numbers 3, 11 and 19 have atoms with the same number of electrons in the outer energy level.
II. Elements with atomic numbers 7, 15 and 33 have atoms with the same number of occupied energy levels.
III. The halogens, group 17, belong to the p-block of the periodic table.
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
Sprawdź rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
B ✔
«I is true: lithium, sodium and potassium are in group 1 and each atom has one valence electron; II is false: nitrogen is in period 2, phosphorus in period 3 and arsenic in period 4, so they have 2, 3 and 4 occupied energy levels; III is true: the highest-energy electrons of the halogens occupy a p sublevel»
Schemat punktowania
One mark for the correct option.