The coordination number of barium ions (Ba2+) in barium fluoride (BaF...
Answer:
Coordination Number:
The coordination number is the number of ions or atoms immediately surrounding a central ion or atom in a crystal lattice. It is defined as the number of nearest neighbors of a central ion in a crystal.
Coordination Number of Barium Ions in BaF2:
The coordination number of barium ions (Ba2+) in BaF2 is 8. It means that each barium ion is surrounded by eight fluoride ions in a cubic arrangement.
Coordination Number of Fluoride Ions in BaF2:
To determine the coordination number of fluoride ions (F-) in BaF2, we need to consider the number of barium ions surrounding each fluoride ion. Since each barium ion has a coordination number of 8, each fluoride ion is surrounded by 8 barium ions.
Therefore, the coordination number of fluoride ions in BaF2 is equal to the number of barium ions surrounding each fluoride ion, which is 8.
Correct Answer:
Option (B) 4 is incorrect because the coordination number of fluoride ions in BaF2 is not determined by their own arrangement, but by the arrangement of barium ions around them.
Option (C) 8 is incorrect because it represents the coordination number of barium ions in BaF2, not the fluoride ions.
Option (D) 6 is incorrect because it does not fit the coordination number of either barium or fluoride ions in BaF2.
Therefore, the correct answer is option (B) 4.
The coordination number of barium ions (Ba2+) in barium fluoride (BaF...
The coordination number of barium ions tells us that it is surrounded by eight fluoride ions (charge 8 x (–1) = –8). In order to balance out the eight negative charges, we need four barium ions (charge 4 x (+2) = +8). Hence, the coordination number of the fluoride ions must be 4.
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