Advertisements
Advertisements
Question
Explain the basis of similarities between metallic and ionic crystals.
Advertisements
Solution
- Ionic and metallic crystals are similar in that they both have non-directional bonds and electrostatic forces of attraction.
- Ionic crystals have electrostatic forces between oppositely charged ions, while metallic crystals have them between valence electrons and kernels.
- Both have extremely high melting points as a result.
RELATED QUESTIONS
The major binding force in diamond is_______________ .
(a) Covalent bond
(b) Ionic bond
(c) Metallic bond
(d) Co-ordinate covalent bond
Give an example each of a molecular solid and an ionic solid.
Ionic solids conduct electricity in molten state but not in solid state. Explain
Copper crystallises into a fcc lattice with edge length 3.61 × 10−8 cm. Show that the calculated density is in agreement with its measured value of 8.92 g cm−3.
A compound is made up of two elements X and Y and crystallizes in bcc structure. Atoms of X are present at the corners of the cube. Atoms of Y are present at the centre of the cube. The formula of the compound is ______.
Sodium crystallizes in bcc structure. If the edge length of unit cell is 4.3 × 10-8 cm, the radius of Na atom is ______.
Solid CO2 is an example of ____________.
The ionic radii of A+ and B− are 0.98 × 10−10 m and 1.81 × 10−10 m. The coordination number of each ion in AB is ______.
Which of the following is TRUE about molecular solids?
____________ is an example of molecular crystal.
Fullerene is an example of ____________.
Ionization enthalpy is lowest in ____________.
London forces are present in ____________.
The hardest substance among the following is:
Which of the following exists as covalent crystals in the solid state?
Which one of the following forms a molecular solid when solidified?
Which of the following is a network solid?
Which of the following cannot be regarded as molecular solid?
(i) SiC (Silicon carbide)
(ii) AlN
(iii) Diamond
(iv) I2
NaCl type crystal (with coordination no. 6 : 6) can be converted into CsCl type crystal (with coordination no. 8 : 8) by applying ____________.
Which of the following is not true about the ionic solids?
Why are liquids and gases categorised as fluids?
Inspite of long range order in the arrangement of particles why are the crystals usually not perfect?
Which of the following molecules is non-polar in nature?
A reddish-pink substance on heating gives off a vapour which condenses on the sides of the test tube and the substance turns blue. If on cooling water is added to the residue it turns to original colour. The substance is ______.
Quartz is which type of crystal?
