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TRENDS IN ELECTRONEGATIVITY OF 3rd PERIOD

Electronegativity is a measure of the tendency of an atom to attract a shared pair of electrons towards itself. Elements Na Mg Al SI P S Cl Ar Electronegativity 0.93 1.13 1.81 2.02 2.19 2.58 3.16 - Note that EN of Ar is not included. Electronegativity is related to the tendency of an atom to attract the shared pair to attract the shared pair of electrons. Since Argon does not form covalent bonds, you obviously cannot assign it an electronegativity value. Moving from one elements to the next across the period, nuclear charge increases by 1 unit and one electron is added to the outer shell. As the positive charge on the nucleus rises, the atom has increasing electron attracting power and therefore an increasing electronegativity.

Mechanical Properties Of Solids

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The mechanical properties of a material are those properties that involve a reaction to an applied load. The mechanical properties of metal determine the range of usefulness of a material and establish the service life that can be expected. Mechanical properties also used to help classify and identify material. The most common properties considered are: Strength The general ability of a material to withstand an applied force. Hardness Hardness is a measure of how easily a material can be scratched or indented. Hard materials are often also very brittle – this means they have a low resistance to impact. Well Known hard materials include diamond and hardened high carbon steels. Brittleness A material that has tendency to break easily or suddenly without any extension first. Good examples are Cast iron, Concrete, High carbon steels, Ceramics, and some polymers such as Urea formaldehyde (UF). Toughness A material that absorbs impact (sudden forces ...

How To Make Coffee

Coffee is one of the most popular beverages all over the world. You can prepare coffee in a number of different ways and here is an article that will tell you how to make coffee with and without using a coffee maker. A yummy refreshing cup of hot coffee makes a good start of the day. The definition of great cup of coffee changes from person from person, because each of us enjoys different tastes of coffee. Some like to have strong coffee while some enjoy drinking subtle coffee. Some of us like to add other flavors to the coffee, like vanilla, while some prefer drinking plain coffee. So, we can say that there are innumerable ways to make a great cup of coffee. Right selection of coffee beans, proper grinding, brewing, etc., together result in a wonderful coffee. So, do you want to know how to make coffee in different ways? Then take a look at some recipes given below. Making Coffee With Coffee Maker Coffee maker is one of the greatest inventions that can yield you a great ...

Best Coffee In The World

A coffee patron or coffee lover looking for the best coffee in the world? Just as there are wine tasters who can grade a wine, similarly there are some coffee experts who can name some of the best coffee brands in the world. If you want to know where does the world's best coffee come from, then read on. Coffee is ground coffee beans brewed into a caffeine drink that has become more like water for many parched souls looking for some instant energy. Many begin their day with the fresh, crisp and natural flavor of coffee and end their day's work with the same. For many drinking coffee is like an experience, to savor the aroma, the flavor and to feel the warm cuppa flowing down gently through their throat. Coffee is basically a bean grown in more than 70 countries around the world and many countries have the major chunk of their economies based on coffee export. Coffee needs specific conditions to grow and produce the best coffee in the world. Legends of the World's...

Is Coffee Good for You

Is coffee good for you is something which has definitely flashed in the minds of coffee aficionados. The aroma is tantalizing and heavenly . The taste is alluring and takes you on a different plane of gastronomic delight. All over the world it is amongst the most popular beverages. Any guesses? Well, actually it would not have been difficult, eh? Because it is our beloved beverage, the coffee! Have it hot or have it cold, it is awesome nevertheless. But it is not without its baggage of positives and negatives on account of its main substance, caffeine. Hence, the skepticism is coffee good for you revolves around this drink. Take a look as to what makes coffee good or bad for you. Is Coffee Good for Your Health? Too much of everything spoils the party. The same goes with coffee. However, for the coffee enthusiasts, there is a good news that the health benefits of coffee outweigh the side effects, but the amount consumed has to be in moderation. The first and foremost r...

How to Roast Coffee Beans?

Not happy with the flavor of your Folgers or Nescafe instant coffee? Want to learn the art of roasting coffee beans at home, for that perfect coffee-licious taste? Here are some home coffee roasting tips. Ever since Satori Kato, the Chicago-based Japanese scientist came up with the idea of making and using instant coffee in 1901, home roasting coffee has become an obsolete art. Thank goodness for the new generation, who, unsatisfied with the standardized versions, decided to resurrect the dying practice of roasting coffee at home. Those who are under the impression that home roasting coffee beans is a tiresome and arduous task, think again! It is actually quite a simple task and hardly takes a few minutes. But the result of this relatively uncomplicated procedure, is simply, a good coffee, that answers to your taste buds! Besides, the taste is delightfully fresh with a stronger flavor. Overall, a good investment of your time! Roasting Co ffee Beans at Home All you need ...

Frozen Coffee Drinks

Coffee is one of the most famous beverages. Let's take a look at the wide variety of frozen coffee drinks... Both alcoholic and non-alcoholic variations of coffee as also the iced and frozen coffee drinks have a great taste. Try some of these recipes this summer. Frozen Coffee Mocha Ingredients 1 tray of frozen coffee ice cubes 1 cup + 2 tablespoons milk 1 and ½ tablespoon cocoa powder 2 tablespoons sugar (fine-grained) 1/2 tablespoons vanilla Procedure Freeze some coffee in an ice-cube tray. Heat 2 tablespoons of milk in the microwave. Mix cocoa powder and sugar in the milk. The milk should be hot enough to melt the cocoa powder and add sugar to this mixture of milk and cocoa powder. Add the remaining milk to this sweetened mixture. Blend this mixture and add the coffee ice cubes to the blender, and blend it until it becomes smooth. Frozen Irish Coffee Ingredients 3 tablespoons Irish whisky 5 oz of hot black coffee 1 tablespoon vanilla ice-cream...