Home
Class 12
CHEMISTRY
When molten zinc is cooled to solid stat...

When molten zinc is cooled to solid state, it assumes HCP structure. Then the number of nearest neightbours of zinc atom will be

A

4

B

8

C

6

D

12

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • SOLIDS STATE

    AAKASH SERIES|Exercise OBJECTIVE EXERCISE - 2 (CRYSTAL DEFECTS)|6 Videos
  • SOLIDS STATE

    AAKASH SERIES|Exercise OBJECTIVE EXERCISE - 2 (PROPERTIES OF SOLIDS)|11 Videos
  • SOLIDS STATE

    AAKASH SERIES|Exercise OBJECTIVE EXERCISE - 2 (TYPES OF SOLIDS OF CRYSTAL STRUCTURES)|16 Videos
  • SOLID STATE

    AAKASH SERIES|Exercise PRACTICE SHEET - 5|30 Videos
  • SOLUTIONS

    AAKASH SERIES|Exercise Objective Exercise -4|50 Videos

Similar Questions

Explore conceptually related problems

A hydrogen atom emits a photon of wavelength 36/(35R) when it is jumped from its nth excited state to the ground state. Then the quantum number n is (R is Rydberg constant.)

It is not possible to measure the atomic radius precisely since the electron cloud surrounding the atom doesnot have sharp boundary. One practical approach to estimate the size of an atom of a non-metallic element is to measure the distance between two atoms when they are bound together by a single bond in a covalent molecule and then dividing by two. For metals we define the term "metallic radius" which is taken as half the internuclear distance separating the metal cores in the metallic crystal. The vander Waal's radius represents the overall size of the atoms which includes its valence shell in a nonbonded situation. It is the half of the distance between two similar atoms in separate molecules in a solid. The atomic radius decreases across a period and increases down the group. Same trends are observed in case of ionic radius. Ionic radius of the species having same number of electrons depends on the number of protons in their nuclei. Atomic radii of the noble gases are larger than the precedent elements of the same periods because

During the crystallisation one fourth mole of Cu_(2) CI_(2) in molten state one millimole of zinc chloride is added. How many cuprous ions are removed? Calculate the number of lattice vacancies created in the crystal.

Oxidation number is the charge which an atom of an element has in its ion or appears to have when present in the combined state. It is also called oxidation state. Oxidation number of any atom in the elementary state is zero. Oxidation number of a monoatomic ion is equal to the charge on it. In compounds of metals with non metals, metals have positive oxidation number while non metals have negative oxidation numbers. In compounds of two difference elements, the more electronegative element has negative oxidation number whereas the other has positive oxidation number. In complex ions, the sum of the oxidation number of all the atoms is equal to the charge on the ion. If a compound contains two or more atoms of the same element, they may have same or different oxidation states according as their chemical bonding is same or different. A compound of Xe and F is found to have 53.3% Xe (atomic weight =133). Oxidation number of Xe in this compound is