Skip to main content

Online notes for 9th class science - Is Matter Around Us Pure

Online notes for 9th class science - Is Matter Around Us Pure

In ths article, we have discussed the 'Non Metals'.
Non Metals : A non-metal is an element that is neither malleable /ductile and they are not good conductors of electricity. Eg: – Krypton, xenon, diamond, graphite etc. They are the allotropic forms of carbon. All the nonmetals are solids or gases, except bromine which is a liquid non-metal at room temperature.
  • Non Metals are not lustrous- Nonmetals do not have a shiny They have a dull appearance. Iodine is a nonmetal having a lustrous appearance. It has a shiny surface as metals have.
  • Non –Metals are generally soft– Most of the nonmetals are soft they can easily be cut with a knife. Carbon is the only nonmetal which is hard. Diamond is the exception which is extremely hard natural substance.
  • Non Metals are not strong- Nonmetals cannot hold large weights. They have very low tensile strength.
  • Non metals are not malleable, they are brittle- Non metals cannot be beaten into thin sheets with a hammer. They break into small pieces when hammered. Sulphur and phosphorus are brittle. They break into pieces when the hammer is a strike on them.
  • Non metals are not ductile- It means that nonmetals cannot be drawn into wires. They are easily snapped on stretching. On stretching, the nonmetal breaks into pieces.
  • Nonmetals are bad conductors of heat and electricity- It means the nonmetals do not allow heat and electricity to pass through them. Diamond and graphite are the forms of nonmetal which are good conductors of electricity. This is a reason why graphite is used for making electrodes.

We are a helping hand for students in all requirements. Our team is working regularly to keep the NCERT solutions of Class 9 and classes are available to visit our website takshilalearning.

Call us : 8800999280/8800999284

Labels:

Comments

Post a Comment

Thank you we will contact ASAP.

Popular posts from this blog

Last Minute Tips to Crack SSC CGL 2019-20 (Tier-I) Exam

Last-Minute Tips to Crack SSC CGL 2019-20 (Tier-I) Exam 1. Don’t read any new topic at the last moment · Try to avoid studying any new topic at the last moment. Just revise what you have already studied. 2. Don’t forget your Admit Card, Photograph and ID Proof · Take a print out of your admit card and original photo identity proof, 1 photo and photocopy of the ID proof. Reach the examination center before time to avoid any last-minute trouble. 3. Maintain your Speed & Accuracy and Maximize your Score · Speed and Accuracy are two important factors to crack any competitive exam. Speed will help in maximizing the attempts while accuracy will ensure that you don’t end up losing marks as the negative marking of 0.5 marks for wrong answers is there. 4. Attempt according to the strategy you followed in the mock tests · Make sure you attempt the easier section first. The exam should be attempted with the same strategy you fol...
4 comments
Read more

Online cbse coaching class for 11 Mathematics

Online cbse Class 11 maths : Online coaching classes for 11 maths  and for other subjects. We are here to solve students problem instantly, So that they can improve himself/herself. One to One Correspondence and Equivalent Sets Suppose the members of the family are dinning and plates are prepared on the table then there is a One to one correspondence between the set of family members and the plates prepared. We will indicate this correspondence by the symbol If each element of a set A is associated with one and only one element of a set B and each element of B is associated with one and only one element of set A, then the sets A and B are said to be in one to one correspondence. If both the sets are finite and if they are in one to one correspondence, it is obvious that they have the same number of elements. If two sets have the same number of elements, they are said to be equivalent sets. Using symbol, we write A B. Between two equivalent sets, a one to one corr...
Post a Comment
Read more

Digital marketing course online and class

Digital marketing course online and class Students and professionals, both are searching for the  digital marketing courses . Generally, the problem occurs in selecting the best  digital marketing course  is – as students and professionals, both have different requirements. Few search for a regular course, some want an additional qualification, or just to improve their skills. On the other hand, every institute has its own pros and cons, learner requirements are not easily matched with the institute’s pattern and regulations. So, they are willing to join some online course as they can learn anytime and anywhere. In India, another challenge is language. Like in North India, Majority of students understands Hindi and they want to do a digital marketing course in Hindi. Finding a good trainer who can teach you in Hindi is very difficult. But this type of course, practical knowledge and getting answers to questions, from a trainer is not so easy. Continue .... ...
Post a Comment
Read more