File Name: periodic classification of elements class 11 questions and answers .zip
- View PDF CBSE Class 11 Chemistry Periodic Classification of Elements MCQs
- NCERT Solutions for Class 10 Science Chapter 5
- Service Unavailable in EU region
Who was the first scientist to classify elements according to their properties? The German Chemist, Johann Dobereiner in early was the first to consider the idea of trends among properties of element. The middle element of each of the triads had an atomic weight about half way between the atomic weights of the other two.
View PDF CBSE Class 11 Chemistry Periodic Classification of Elements MCQs
Question 1. Compare and find out. Question 2. Question 3. Question 4. Why do you think the noble gases are placed in a separate group?
Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice? Name a three elements that have a single electron in their outermost shells. Is there any similarity in the atoms of these elements?
What, if anything, do their atoms have in common? Question 5. In the Modern Periodic Table, which are the metals among the first ten elements? Question 6. By considering their position in the Periodic Table, which one of the following elements would you expect to have maximum metallic characteristic? Ga Ge As Se Be. Which of the following statements is not a correct statement about the trends when going from left to right across the periods of periodic Table.
Element X forms a chloride with the formula XCl2, which is a solid with a high melting point. Which element has a two shells, both of which are completely filled with electrons?
An atom has electronic configuration 2, 8, 7. Atomic numbers are given in parentheses. Please send your queries to ncerthelp gmail. Link of our facebook page is given in sidebar. Copyright ncerthelp. Follow Us On Facebook. Please Share this webpage on facebook, whatsapp, linkdin and twitter. Facebook Twitter whatsapp Linkdin. Business Studies. Political Science.
NCERT Solutions for Class 10 Science Chapter 5
Multiple Choice Questions for important part of exams for Grade 11 Chemistry and if practiced properly can help you to get higher marks. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning. There are stories of innovation, sacrifice, going beyond the call of duty, challenges faced and creatively solved, humour, finding joy in adversity etc. It will be highly useful to
The first section of the chapter focuses on the early attempts at the classification of elements so as to make order out of chaos. Under this section, the emphasis is laid on the following important classification of elements:. The drawbacks of both the system of classification mentioned above are also explained in the chapter, Periodic Classification of Elements. In Newland's law of orders, the comparison of elements with that of notes of the musical instrument is shown. The second section of the chapter, Periodic Classification of Elements talks about Mendeleev's periodic table wherein, the classification of elements is done on the basis of the atomic mass of the elements. The similarity in the chemical properties of elements is explained on the basis of their atomic mass unit.
Online view is also being provided for the convenience of students. Modern Periodic Law : the physical and chemical properties of elements are the function of their atomic numbers. As the effective nuclear charge on the valence electrons in the metals is comparatively less, they have tendency to form cations. Fluorine atom is smaller than chlorine atom as it has less number 2 of shells compared to that in chlorine shells 3. Isotopes are the elements having similar chemical properties but different atomic masses. For example, argon with atomic mass of 40 comes before potassium with atomic mass
Service Unavailable in EU region
Question 1. What is the basic theme of organisation in the periodic table? This has made the study simple because the properties of elements are now studied in form of groups rather than individually.
NCERT Solutions are very useful for students to learn how to answer questions efficiently in an exam. Students will study various topics in this unit regarding the nomenclature of elements in the periodic table, their properties and more. The topic classification of elements educates students on why we need to classify elements, the need for preparing, periodic table and grouping elements with similar properties together.