d and f BLOCK ELEMENTS

What is the electronic configuration of the ground state of Actinium (Ac, Z=89)?

• [Rn] 5f¹ 7s²
• [Rn] 6d² 7s¹
• [Rn] 6d⁰ 7s³
• [Rn] 6d¹ 7s²

What is the electronic configuration of the ground state of Lanthanum (La, Z=57)?

• [Xe] 4f¹ 6s²
• [Xe] 5d² 6s¹
• [Xe] 5d⁰ 6s³
• [Xe] 5d¹ 6s²

What is the electronic configuration of the ground state of Tantalum (Ta, Z=73)?

• [Xe] 4f¹⁴ 5d² 6s³
• [Xe] 4f¹⁴ 5d⁴ 6s¹
• [Xe] 4f¹⁴ 5d¹ 6s⁵
• [Xe] 4f¹⁴ 5d³ 6s²

What is the electronic configuration of the ground state of Hafnium (Hf, Z=72)?

• [Xe] 4f¹⁴ 5d¹ 6s³
• [Xe] 4f¹⁴ 5d³ 6s¹
• [Xe] 4f¹⁴ 5d⁰ 6s⁴
• [Xe] 4f¹⁴ 5d² 6s²

What is the electronic configuration of the ground state of Rhenium (Re, Z=75)?

• [Xe] 4f¹⁴ 5d⁴ 6s³
• [Xe] 4f¹⁴ 5d⁶ 6s¹
• [Xe] 4f¹⁴ 5d³ 6s⁴
• [Xe] 4f¹⁴ 5d⁵ 6s²