What are the bond angles in a regular octagon?

Q: You are carrying out an investigation to determine how your pet Basilisk Lizard is able to "walk"…

A: Density is a measure of mass per volume. The average density of an object is equal to its total mass…

Q: Calculate the atomic packing factor for diamond (refer to Fig. 15C.15); assume that the atoms touch…

A: In crystallography, atomic packing factor, packing efficiency or packing fraction is the fraction of…

Q: Define the properties of covalent atomic solids ?

A: Covalent atomic solids: in this type of solids, atoms are bonded by covalent bonds in a continuous…

Q: 1. a) What is the definition of atom, molecule and polymer? b) Show the electron configuration of…

A: Definition  Atom:: An atom is a particle of matter that uniquely defines a chemical element. An atom…

Q: 5. What is the stacking pattern in the simple cubic lattice structure? aaa, abab, or abcabc?

A: Since you have posted multiple questions as per guidelines we can answer only one per session. If…

Q: How to calculate octahedral voids ?

A: Given question is : How to calculate octahedral voids = ?

Q: sketch 2D network structure of amorphous B2O3

A: Borate glass: B2O3: the glass former consisting of corner -sharing BO3 triangles connected by bridge…

Q: What is a polymer? What is the difference between a polymer and a copolymer?

A: Polymer is a type of natural or synthetic substance which is composed of large number of…

Q: What is the coordination number of an atom in a facecentered unit cell?a) 4 b) 6 c) 8 d) 12

A: Coordination number is number of ligands attached to central metal atom.

Q: Draw the following directions or planes in a single unit cell. (a.) [010] , (b.) (220) , (c.) (111),…

A: crystals are made of infinite no of unit cells.unit cell is smallest unit of crystals if repeated…

Q: How many total cations (A and B) and anions (X) are there in the unit cell below? = A = B = X

A:

Q: What is the difference between a primitive and body centered unit cell?

A:

Q: What is the molecular formula of the compound represented by the unit cell below? Xenon Fluorine

A: The smallest repeating unit with full symmetry of crystal structure is known as unit cell.

Q: 7.3 Show that a sphere of radius 0.73r, where r is the radius of the corner atoms, will fit in the…

A: Primitive unit cells are those unit cells in which the atoms are present only at the corners of…

Q: Describe the formation of a hydrogen bond.

A: The formation of a hydrogen bond has to be explained.

Q: What are the Nonbonding atomic solids?

A: The atomic solid is one of the types of crystalline solids. In atomic solids, the composite unit is…

Q: Draw an orthorhombic unit cell and mark on it the (100), (010), (001), (011), (101), and (110)…

A: The planes of the orthorhombic unit cell can be drawn by taking the reciprocal of the coordinates to…

Q: Explain the factors that affect the length of a block copolymer.

A: A block copolymer is a multiphase heterogeneous polymer in which different blocks (segments of…

Q: What is the difference between hexagonal closest packing and cubic closest packing? What are the…

A: Hexagonal Closed Packing In a hexagonal closest packed structure, the third layer has the same…

Q: Describe the characteristic features of a simple cubic unit cell?

A: A simple cubic cell is a type of unit cell with atoms arranged in all the corners of the unit cell.

Q: What is polymorphs structure?

A: To Find: Polymorphs structure

Q: The ratio of first nearest neighbor distance of .4 the body-centered (bcc) to that of face-…

A:

Q: In the following unit cell, which vector represents the [121] direction? B. +y OD B O A -/2

A:

Q: Band theory uses molecular orbital theory to describe the bonding in metals and other solids.…

A: Conductors are substances that are good conductor of heat and electricity. Insulator is material…

Q: What is the coordination number of a chromium atom in the body- centered cubic structure of…

A: To solve this problem we will draw the BCC structure .

Q: how do you calculate the planar density (100) and (110) of a simple cubic structure

A:

Q: (a) What are the C¬C¬C bond angles in diamond?(b) What are they in graphite (in one sheet)? (c)…

A: a) The C-C-C bond angle in carbon is 109.5 degrees. Here all the carbon are sp3 hybridise and…

Q: How do an addition polymer and a condensation polymer differ from each other?

A: Addition polymer:Polymers made up of monomers which are added without the loss of any atoms known as…

Q: What are the network covalent atomic solids?

A: Definition of solids: The compound has, sharp dissolving focuses, fixed shapes, and has more…

Q: is expected to have the highest boiling and 2 is the most polarizable. а. На b. I2 с. О2 d. Ar

A: Boiling point depends on molecular weight of compound and intermolecular forces.  1. I2 molecule has…

Q: Define allotropy. Describe different allotropes of Carbon including  a) diamond, b) graphite and…

A: Allotropes are forms of the same element which have either exist in the same or different physical…

Q: Dipole - Dipole bonds are a form of hydrogen bonding. O False O True

A: Hydrogen bonds are formed between hydrogen atom covalently bonded with electronegative atom and…

Q: Dipole-dipole force can not be found in CO2 O2 O NH3 о со

A: Dipole - dipole force can not be found in ?

Q: Describe the features of the body-centered cubic unit cell?

A: Unit cell is the smallest repetitive portion of a solid crystal. Unit cell represents three…

Q: What is a household item that has a hydrogen bond?

A: A chemical bond is a chemical attraction that occurs between two particles.  There are different…

Q: What is the difference between tetrahedral and octahedral voids?

A: The difference between tetrahedral and octahedral voids can be shown in below

Group 14 Elements

The following elements come under group 14 of the periodic table.