Answer
See the explanation
Work Step by Step
a. An alkaline earth element in period 3
Alkaline earth elements = Group 2 (Be, Mg, Ca, Sr, Ba, Ra)
Period 3 = third row → Magnesium (Mg)
Answer: Magnesium (Mg)
b. A noble gas in period 6
Noble gases = Group 18 (He, Ne, Ar, Kr, Xe, Rn)
Period 6 = sixth row → Xenon (Xe)
Answer: Xenon (Xe)
c. A main group element in period 3 that has p orbitals half-filled
Half-filled p orbitals = p³ configuration
Period 3 elements with p electrons: Group 13–18 → (Al, Si, P, S, Cl, Ar)
p³ corresponds to Group 15, so → Phosphorus (P)
Answer: Phosphorus (P)
d. A transition metal in period 4, group 11
Group 11 transition metals = Cu, Ag, Au
Period 4 = fourth row → Copper (Cu)
Answer: Copper (Cu)
e. An inner transition metal with its 5f orbitals completely filled
Completely filled 5f¹⁴ configuration = last actinide → Lawrencium (Lr)
Answer: Lawrencium (Lr)
f. A transition metal in period 6, group 10
Group 10 = Ni, Pd, Pt
Period 6 = sixth row → Platinum (Pt)
Answer: Platinum (Pt)
