a) 𝐈
b) 𝐌𝐨
c) 𝐒𝐦
d) 𝐓𝐜
8. For the chromium atom in its ground and neutral
state, the electron configuration is:
a) [He] 3d⁵, 4s¹
b) [Ar] 3d⁵, 4s¹
c) [Ar] 3d⁴, 4s²
d) [Kr] 3d⁵, 4s¹
9. For the ions: fluoride,(F⁻), sodium (Na⁺), magnesium
(Mg²⁺), and aluminum (Al³⁺), which of the following represents the
correct ionic radius trend?
a) F⁻ > Na⁺ > Mg²⁺ > Al³⁺
b) Al³⁺ > Mg²⁺ > Na⁺ > F⁻
c) Al³⁺ < Mg²⁺ < Na⁺ < F⁻
d) Na⁺ > Mg²⁺ > Al³⁺ > F⁻
10. Boron has been found to have a lower ionization potential
than beryllium. From this it can be said that
a) It is to be expected due to the trend in ionization potential
(energy)
b) When boron loses the electron in the 𝐩 orbital, it acquires an
electronic configuration with greater stabilization.
c) Beryllium stabilizes much more than boron at its first
ionization energy
d) We cannot explain this phenomenon based on their electronic
configurations
11. The molecule PF₂Cl₃ is 𝐧𝐨-𝐩𝐨𝐥𝐚𝐫. Which of the geometries
presented in the diagram below must be correct?
- 6 The Valence Shell Element 5s 4d Is A I B Mo C Sm D Tc 8 For The Chromium Atom In Its Ground And Neutral State 1 (70.25 KiB) Viewed 15 times
- 6 The Valence Shell Element 5s 4d Is A I B Mo C Sm D Tc 8 For The Chromium Atom In Its Ground And Neutral State 2 (110.75 KiB) Viewed 15 times
elements of symmetry:
a) E, C₃, C₂, σh, 3σv
b) E, C₃, S₃, 3C₂, σh, 3σv
c) E, C₃, 3C₂, σh, 3σv
d) E, C₃, S₃, C₂, σh, 3σv
14. By analyzing the symmetry elements of the structure of 𝐍₂𝐅₂
(shown in the figure), we can determine that its point group
is:
- 6 The Valence Shell Element 5s 4d Is A I B Mo C Sm D Tc 8 For The Chromium Atom In Its Ground And Neutral State 3 (27.01 KiB) Viewed 15 times
H H H H Hort 0-0 Peróxido de hidrógeno, H,O, agua, H, O 2 I" Н.Н Н. I Р H H H Cubane,CH O Fósforo blanco, P.