In a face centered cubic structure, every atom has 12 neighbors. Which arrangement of balls serves as the best model for this st
ructure?
a) 8 balls at the corners of a cube, 6 balls in the centers of the cubes faces.
b) 8 balls at the corners of a cube.
c) 8 balls at the corners of a cube, and one ball in the center of the cube.
d) 12 balls arranged equally apart from eachother around a circle.
a) 8 balls at the corners of a cube, 6 balls in the centers of the cubes faces.
b) 8 balls at the corners of a cube.
c) 8 balls at the corners of a cube, and one ball in the center of the cube.
d) 12 balls arranged equally apart from eachother around a circle.
1 answer:
A solid with a unit cell that follows a structure to the face-centered cubic crystal would look like that shown in the attached picture. Thus, the model should consist of 8 balls, one for each corner of the cube. Also, It would need 6 balls, one at each center of the cube's faces. So, the answer is A.
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Answer:
In general, the energy needed to remove an electron (the ionization energy) increases as the atomic number increases across a period.
Explanation:
Each additional proton increases the attraction between the nucleus and the electron.
Thus, it takes more energy to remove an electron as you add extra protons.
