Classification of crystalline Solid

Crystalline solid are classified based on the molecule present in the crystal and the chemical bond between the molecule.

Crystalline solids are classified into following category.

Molecular Solids
Ionic Solids
Metallic Solids
Covalent Solids


Molecular Solid:
Molecular solids are the crystalline solid form in which molecule is bond with the weak physical forces. Some crystalline solid may attach by the weak hydrogen bond. The molecular are may be the polar or nonpolar molecular.
Example: ice
.
Ionic Solid :
Ionic solids are the crystalline solid form in which ion is present. The ion is with the positive and negative charge.  The ion is attached with electrostatic bond
Example NaCl

Metallic Solids:
Metallic solid are the crystalline solid form in which metal ion which has positive charge (Cation).
Example: All metals

Covalent Solids:
Covalent solids are the crystalline solid form in which lattice point is the atom.

Definition of Crystalline solid

Definition:
Crystal is a solid in which the constituent atoms, molecules, or ions are packed in a regularly ordered, repeating pattern extending in all three spatial dimensions.
-In crystalline solids are compounds in which the molecules are packed (bonded) in a defined, specific and repeating order.
- A repetitive arrangement in solid makes the three dimensional structure which is known as crystal lattice.

Characteristic of Crystalline solid:
- Any crystal is characterized by its internal structure and habit. Habit is the description of the outer appearance of a crystal whereas the internal structure is the molecular arrangement within the solid.

- Crystalline solid have sharp melting point

- Crystalline solids are the most stable solids compared to other solids.

- Crystalline solid show the anisotropic property.

-Crystalline solid is hard and brittle.

Difference between amorphous and crystalline solid

Difference between amorphous and crystalline solid  
Crystalline solids and amorphous solids are the two form of the solid. Crystalline and amorphous solid have different physical and chemical property. There is so many difference between the amorphous solid and crystalline solid.

Here the list of difference between amorphous and crystalline solid.


Amorphous Solid
Crystalline Solid
Definition
Amorphous solid does not have definite geometry. The molecules are randomly scattered.
Crystalline solid are the solid in which molecule are arranged in ordered and repeating pattern 
arrangement
Molecules are not properly arrange
Molecules are orderly arranged and form the lattice.
Example
Plastic, Glass
Diamond, graphite
Solubility
Crystalline solid have low solubility corresponding to amorphous solid
Amorphous solid have highly soluble corresponding to crystalline Solid.
Symmetry
amorphous solids are unsymmetrical
Crystalline solid is symmetrical
Melting point
Amorphous solid have melting range. To measure exact melting range is difficult
Crystalline solid have sharp melting point. Exact melting point can be measured.
Property
Amorphous solid have isotropic  property
Crystalline solid have anisotropic property.

Difference between osmosis and diffusion

Diffusion and osmosis is which state the movement of solvent and solute according to the concentration.

Following are the difference between osmosis and diffusion.


Osmosis
Diffusion
Definition
Osmosis is the movement of solvent from semipermeable membrane from a lower concentration to higher concentration.
Diffusion is the movement of solute from an area of higher concentration to lower concentration.
Movement
In osmosis, only movement of solvent happens
In diffusion movement of solvent and solute happened.
Phase
Osmosis is possible only in liquid phase
Diffusion is possible in liquid and gaseous phase.
Function
Osmosis helps the maintaining water level in cells. help in transport the nutrient
Diffusion is important in creating energy help in exchange the gases in animals.
Rate
Osmosis is a slow process
Diffusion is a fast process
Semi permeable membrane
It requires the semipermeable membrane
It does not require the Diffusion semi permeable membrane.

Difference between ROM and RAM

Difference between ROM and RAM

RAM and ROM are the two most popular word used in technology.  RAM and ROM are the most important part of the computer. There are so many difference between ROM and RAM

Following are the difference between ROM and RAM.

RAM
ROM
Full form
RAM means random access memory
ROM  means read only memory
Storage
RAM is a temporary Storage
ROM is a permanent Storage
Access
RAM is accessible memory. You can modify the data. You can read write or removed the data
ROM can only be read by CPU but, the data cannot be modified in ROM.
RAM is a read-write memory
ROM is a read only memory
Types
There are basically two types of RAM
Static RAM and
Dynamic RAM
There are five basic ROM types
ROM
PROM
EPROM
EEPROM
Flash memory
Data hold
ROM can hold data without power
RAM cannot hold data without power
Storage type
ROM is non volatile storage
RAM is volatile storage

Difference between Endocrine and Exocrine gland

Difference between Endocrine and exocrine gland
In human body two Exocrine gland and endocrine gland, two types of the gland are available. Endocrine and exocrine The main difference between endocrine and exocrine gland is secretion. Endocrine glands are ductless while exocrine gland has a duct.
Here the difference between Endocrine and exocrine gland.


Endocrine gland
Exocrine Gland
Duct System
Endocrine gland is the ductless gland which secrets the hormones endocrine Hormones directly release into the blood.
Exocrine gland releases the secretion through the duct. It may be outside the body or into the cavity.
Example
Hypothalamus, Pituitary, Thyroid,  Parathyroid,  Adrenal gland
Salivary gland, Lacrimal gland, Pancreas, Liver.
Secretion
Endocrine gland secrets Hormones
Exocrine glands mostly secrets Enzyme. 
Function
Endocrine glands regulate and help the activity like the reproductive system menstrual cycle, metabolism activity, metabolism activity
 The exocrine gland controls the temperature, digestion, lactation. 
Types
Two types of endocrine glands are in body. primary endocrine glands and secondary endocrine glands.
There are different types of gland unicellular multicellular etc