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How many unit cells share an atom that is on the face of a cubic unit cell?
Wiki User
∙ 13y ago
2 cells share single atom on face
Wiki User
∙ 13y ago
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What is the lowest and highest number of shared and unshared atoms in a unit cell of a FCC structure and a simple cubic structure?
Your question, if I understand it correctly, asks to explain the reasoning behind the coordination number, or number of adjacent atoms, of an atom in a simple cubic structure versus an atom in a face centered cubic structure (FCC).Before we proceed, I would like to clarify one thing:A unit cell of a simple cubic crystal has 1 atom, while a unit cell of FCC crystal has 4 atoms. This may be a little counterintuitive at first, but consider how the atoms are shared. For the simple cubic structure, there are eight individual atoms - one at each corner of the cube. The unit cell, however, has to share each atom with the 8 other adjacent cells. Thus a unit cell gets 8 atoms only 1/8 of the time, hence 8*(1/8) = 1 atom per simple cubic unit cell. Similarly, FCC has the 1 atom from simple cubic, plus half of the 6 atoms on each of it's faces. Thus, FCC has 4 atoms per unit cell.On to the main question. In short, given a homogeneous, perfect crystal the coordination numbers of all the atoms are the same. All atoms are shared equal with their neighbors.For the simple cubic case this is easy to see. Like the simple gumdrop creations of second graders, you can start at any gumdrop to make the creation. Any corner is the same relative to its neighbors as any other corner. For FCC the same is true.
Crystalline silicon has a cubic structure the unit cell edge is 543pm calculate the number of unit cells per cubic cm?
8
What is the number of atoms in FCC unit cell?
A FCC or Face Centered cubic unit cell has 4 atoms. It is calculated like this. There are 8 corners of the unit cell and each corner has one atom.But each atom is shared by 8 unit cells. So. total no. of atoms at corners= 1/8 *8=1 atom . Also, there are 6 faces which have one electron in the centre of it. Each such electron is shared between 2 unit cells. This gives the total no. of atoms at the centre of faces of unit cell=1/2 * 6 = 3 atoms. Adding the two, we get four atoms in an unit cell 1+3=4 atoms.
Is an atom a cell?
Nuclei is plural for nucleus. Most cells each have one nucleus, but some have many nuclei and certain cells, such as red blood cells, do not have a nucleus. The term for a cell with more than one nucleus is coenocytic. This can be because DNA replication has not been followed by cytokenesis, but there are some specialised cells that are multinucleated, such as some fungi and skeletal muscle in mammals. one nucleus but inside that nucleus is a nucleolus.
Where is the nuclei located?
In animal cells the nucleus is usually in the middle of the cell where as in plant cells the nucleus is not actually always in the center of the cell this is due to the presence of the vacuole.
Do adjacent cells share common cell wall?
In compact tissues the adjacent cells share common cell wall. The cytoplasm of these cells also remain connected through plasmodesmata.
What structure do bacteria share with plants cells but not animal cells?
both the bacteria and the plant cell have a cell wall, where an animal cell does not
What feature do plant cells share with prokaryotic cells but not animal cells?
Plant cells and prokaryotic cells have a cell wall while animal cells do not
Which is smaller atom or cell?
An atom is several orders of magnitude smaller than a cell. Even the smallest of cells is composed of trillions of atoms.
What is the fundamental unit of all living things?
Cells are the basic units of all living things.
What 3 things plant cells share with animal cells?
nucleus,cytoplasm,cell membrane!
How many electrons are in Polonium?
Polonium is simple cubic. each corner is 1/8 atom. simple cubic has 8 corners therefore: (1/8) x 8 = 1 atom/unit cell. Polonium is simple cubic. each corner is 1/8 atom. simple cubic has 8 corners therefore: (1/8) x 8 = 1 atom/unit cell.
Gallium crystallizes in a primitive cubic unit cell The length of an edge of this cube is 362 pm What is the radius of a gallium atom?
A Primitive cubic cell is 2 half length atoms long. Since the radius is half of the diameter of an atom: 362/2=181 pm
What is the lowest and highest number of shared and unshared atoms in a unit cell of a FCC structure and a simple cubic structure?
Your question, if I understand it correctly, asks to explain the reasoning behind the coordination number, or number of adjacent atoms, of an atom in a simple cubic structure versus an atom in a face centered cubic structure (FCC).Before we proceed, I would like to clarify one thing:A unit cell of a simple cubic crystal has 1 atom, while a unit cell of FCC crystal has 4 atoms. This may be a little counterintuitive at first, but consider how the atoms are shared. For the simple cubic structure, there are eight individual atoms - one at each corner of the cube. The unit cell, however, has to share each atom with the 8 other adjacent cells. Thus a unit cell gets 8 atoms only 1/8 of the time, hence 8*(1/8) = 1 atom per simple cubic unit cell. Similarly, FCC has the 1 atom from simple cubic, plus half of the 6 atoms on each of it's faces. Thus, FCC has 4 atoms per unit cell.On to the main question. In short, given a homogeneous, perfect crystal the coordination numbers of all the atoms are the same. All atoms are shared equal with their neighbors.For the simple cubic case this is easy to see. Like the simple gumdrop creations of second graders, you can start at any gumdrop to make the creation. Any corner is the same relative to its neighbors as any other corner. For FCC the same is true.
What is the order from least to greatest using the following words atom melecule cell organism?
a molecule is composed of atoms, a cell is composed of molecules, an organism is composed of cells. atom molecule cell organism
Crystalline silicon has a cubic structure the unit cell edge is 543pm calculate the number of unit cells per cubic cm?
8
Can an cell be considered the smallest part of an atom that can change on its own?
cells are not parts of atoms!
