Sunday, September 12, 2010

born-haber cycle

Let us learn about born-haber cycle

The Born–Haber cycle is referred as an approach to analyzing reaction energies. Born-haber cycle was named after & developed by the 2 German scientists Max Born & Fritz Haber.

The Born–Haber cycle include the formation of an ionic compound from the reaction of a metal often a Group I or Group II element with a non-metal. Born–Haber cycles are applied primarily as a means of calculating lattice enthalpies that cannot otherwise be measured directly.

In our next blog we shall learn about coordinate plane graph paper I hope the above explanation was useful.Keep reading and leave your comments.

Wednesday, September 8, 2010

importance of chemistry

Let us learn about importance of chemistry

Chemistry has a reputation for being a complicated & boring science, but for the most part, that reputation is undeserved. Fireworks & explosions are based only on chemistry, so it's definitely not a boring science.

Chemistry is refers as science which deals with the properties of organic & inorganic substances & their interactions with other organic & inorganic substances.

We use chemicals every day life & perform chemical reactions without thinking much about them. Chemistry is very important because everything we do is chemistry! Even our body is made of chemicals. Chemical reactions occur when we breathe, eat, or just sit there reading. All matter is made of chemicals; therefore the importance of chemistry is that it's the study of each & everything.


In our next blog we shall learn about generating awareness on disaster management I hope the above explanation was useful.Keep reading and leave your comments.

Tuesday, September 7, 2010

properties of lithium

Let us learn about properties of lithium

Lithium is the 1st of the alkalis in the periodic table. In nature Lithium found like a mixture of the isotopes Li6 and Li7. Lithium is the lightest solid metal; Lithium is soft, silvery-white, with a low melting point & reactive. Many of Lithium’s physical & chemical properties are more similar to those of the alkaline earth metals than to those of Lithium’s own group.

Lithium is most commonly wheedling out from spodumene.

Lithium salts color flames bright red

Lithium is not used for structural applications


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Monday, September 6, 2010

physical properties of hydrogen

Let us learn about physical properties of hydrogen

Hydrogen is originated in the atmosphere at trace levels. Hydrogen is synthesized from hydrocarbons & from water where it constitutes the lightest fraction of the H2O molecule. Hydrogen gas cannot sustain any life.

1) Hydrogen is Colorless 2) Hydrogen is Highly flammable 3) Hydrogen is Light in weight 4) Density: 0.0899*10 -3 g.cm -3 at 20 °C 5) Melting point: - 259.2 °C 6) boiling point: - 252.8 °C 7) Pure hydrogen is a gas under normal conditions. 8) Hydrogen is diatomic & much lighter than air. 9) Hydrogen has such small mass that it can escape earth's gravitational pull and fly off into space. 10) The gas mixes well with air, explosive mixtures are very easily formed. 11) The Hydrogen is gas is lighter than air.

In our next blog we shall learn about balance general I hope the above explanation was useful.Keep reading and leave your comments.

Sunday, September 5, 2010

types of colloids

Let us learn about types of colloids

Colloids are mixtures whose particles are smaller than particles but larger than the size of a molecule which can be seen with the naked eye. Colloids are 1 of 3 major types of mixtures, the other 2 being solutions & suspensions. The 3 types of mixtures are distinguished by the size of the particles that make them up. The particles in a solution are about the size of molecules, approximately 1 nanometer 1 billionth of a meter in diameter. Those which make up suspensions are larger than 1,000 nanometers. Finally, colloidal particles range in size between 1 & 1,000 nanometers. Colloids are said to be as colloidal dispersions because the particles of which they are made are dispersed, or spread out, through the mixture.

Types of colloids

Some examples include mayonnaise, milk, butter, gelatin, jelly, whipped cream, muddy water, plaster, colored glass, & paper.

Every colloid consists of 2 parts: colloidal particles & the dispersing medium. The dispersing medium is the substance in that the colloidal particles are distributed. In muddy water, the best example, the colloidal particles are tiny grains of sand, clay & silt. The dispersing medium is the water in that these particles are suspended.

Colloids can be made from almost any combination of gas, solid & liquid. The particles of that the colloid is made are called the dispersed material. Any colloid consisting of a solid dispersed in a gas is said to be as smoke. A liquid dispersed in a gas is considered to as a fog.


Dispersing medium

Dispersed phase

Name

Solid

Solid

Solid sol

Solid

Liquid

Gel

Solid

Gas

Solid foam

Liquid

Solid

Sol

Liquid

Liquid

Emulsion

Liquid

Gas

Foam

Gas

Solid

Solid aerosol

Gas

Liquid

Aerosol

In our next blog we shall learn about granite gradebook I hope the above explanation was useful.Keep reading and leave your comments.

Thursday, September 2, 2010

valence shell

Let us learn about valence shell

The copper atom has only 1 electron. This represents that the copper atom has 1 electron that is near the outer portion of the atom. The outer shell of any atom is said to be as valence shell.

Valance shell electronic configuration which is the representation of the participation of electrons in orbits of atom.

The outermost shell of an atom is the valence shell that contains the electrons most likely to account for the nature of any reactions involving the atom & of the bonding interactions Valance shell has with other atoms. Electrons in the valence shell are termed as valence electrons

In our next blog we shall learn about jj thomson atomic model I hope the above explanation was useful.Keep reading and leave your comments.

Wednesday, September 1, 2010

kingdom animalia

Let us learn about kingdom animalia

Each animal is the members of the Kingdom Animalia & also called Metazoa. This kingdom animalia does not contain the prokaryotes Kingdom Monera, includes bacteria, blue-green algae or the protists Kingdom Protista, and includes unicellular eukaryotic organisms. All members of the Animalia are multicellular, & all are heterotrophs which are, they rely directly or indirectly on other organisms for their nourishment. Most ingest food & digest it in an internal cavity.

With over 2 million different kinds of animals Kingdom Animalia is the biggest & largest of the kingdoms. But when we think of an "animal", what image comes to our mind? While animals like bears, fish, & birds are the most familiar to us, over half of all the animals on Earth belong to a group of animals known as "arthropods". Arthropods include animals such as centipedes, insects, crabs, & spiders. This means that the preponderance of animals come from a group of critters that give most folks the creeps!

In our next blog we shall learn about elevation designs I hope the above explanation was useful.Keep reading and leave your comments.