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Periodic Classification of elements (Notes) NCERT

Dobereiner’s traids When elements are arranged in the. Order of increasing atomic masses, group of three elements known as traids, having similar properties are obtained. The middle element of the traid being equal to the arithmetic mean of the atomic masses of the other two elements.  Following are the examples. 1. The alkali Metal group Elements Symbols Atomic masses Lithium Li 7 Sodium Na 23 Potassium K 39 2. Alkaline Earth metal group Elements Symbols Atomic masses Calcium Ca 40 Strontium Sr 88 Barium Ba 137 3. The halogen group Elements Elements Symbols Atomic masses Chlorine Cl 35.5 Bromine
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Overhead Projectors (defination, working, uses, advantages and disadvantages) | HPBOSE

Projectors are basically used for presenting our ideas among others. In starting Projectors are mainly used in educational fields. Today we use projectors in educational fields as well as in business fields. In this article, I will show the projectors used in past that is Overhead Projectors. This topic is also listed in HP board computer science syllabus. Let's start with his definition. What is Overhead projector? Overhead projectors or OHP's are the type of projector used for project images on large flat wall. It has a flat transparent top and a light source beneath transparent top and reflecting mirror and a fan to cool it. Above the box there is a long arm that has a mirror to catch and redirect the light towards the screen. Uses of Overhead Projectors  OHP is one of the most frequently used tool in education and training. Today, we use digital projectors in the place of OHP which is smaller in size as compared to OHP. Advantages of OHP 1. OHP's not much g
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E-mail | Class 10th Computer Science | NCERT | HPBOSE

Email is listed in the syllabus of class 10th of HPBOSE. Through this article, I will show you the basic but important concept related to this topic. So, let's get started.  What is E-mail? E-mail is the short form of Electronic mail. It allows us to send and receive email in any part of any world. Email uses various protocols.  Email is a text based mail consisting of lines of text and can include attachments such as audio messages, pictures and documents. For making a new email account we must have to define email address and password. Some of the major email service providing services are Google, Yahoo, Hotmail etc. Basic form of email address Email address consists of two sections: Username Hostname An email address  looks like Username@hostname  The username is written in left and hostname(like gmail.com, yahoo.in) is
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What is Redox Reaction? Class 10th Notes (Chemical Equations and Reactions )

  What is Redox Reaction? The reaction in which both oxidation and Reduction reaction occur, is called Redox Reaction.
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Class10th Chapter 1( Chemical Reactions and Equations ) Science notes

 What happened with iron when it exposed to humid temperature? Why grapes and other fruits got fermented? All the situations given above are chemical changes. Whenever a chemical changes, a chemical reaction takes place. All the things about this chapter, we discussed in the pdf whose link is given below. Click here to access class 10th notes
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Can students from Maharashtra State give Pgcet entrance exam?

Postgraduate common entrance test is the Karnataka state level test for admission in M.Tech, M.Arch and various other PG programs. The candidates giving this test should have passed any government recognized institution located in Karnataka either of the candidates’ parents should have studied in Government recognized institutions in Karnataka for a minimum period of 7 years. So,it is possible to give pgcet test if you are not studied in Karnataka.
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How to insert images in PowerPoint presentation

Pictures perform a very good role in making our presentation effective, good-looking. In this article, we learn how to insert images in a slide of presentation. Here the steps which help you in inserting images in your presentation. 1. Click on slide where you want to insert a picture. 2. Click on insert tab. 3. In the Illustrations group, select pictures option. Pictures dialog box will open. 4. Select the picture which you want to insert in your slide. 5. Click on Insert button. The picture will inserted in your slide. You can also insert a Clip Art ( A ready made picture) by performing the following steps. 1. Click on Insert menu. 2. Select Clip Art option.   The clip art pane will appear on right hand of the window. 3. A Search box appear, type the keyword related to the picture you are looking for. 4. Press Enter button OR Click on go button. 5. Select the picture which you want to insert in your slide. The selected picture will be inserted in you
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