06 Phosphine Gas फास्फिन बनाने की प्रयोगशाला विधि chap 07 p Block elements || Class 12th

डाईएथिल ईथर बनाने की प्रयोगशाला विधि |एसीटैल्डिहाइड बनाने की प्रयोगशाला विधि |एसीटोन बनाने की प्रयोगशाला विधि |कुछ महत्वपूर्ण कार्बोक्सिलिक अम्ल

फिनॉल्फथेलीन अभिक्रिया |नाइट्रीकरण |ईथर का सामान्य परिचय |ईथर का सामान्य सूत्र |वर्गीकरण |ईथरों का नामकरण |ईथरों में समावयवता |ईथर बनाने की सामान्य विधियाँ |डाइ एथिल ईथर बनाने की प्रयोगशाला विधि

परिचय|क्षार धातुओं के साथ समानताएँ|हैलोजन के साथ समानताएँ|हाइड्रोजन के समस्थानिक|उपलब्धता|बनाने की विधियाँ|प्रयोगशाला विधि|जल से|धातुओं पर जल की क्रिया द्वारा|धातु हाइड्राईडो की जल के साथ क्रिया द्वारा|जल के विद्युत अपघटन द्वारा|धातुओं पर क्षारों की क्रिया द्वारा|बॉस की विधि द्वारा|भौतिक गुण|OMR|Summary

Assertion (A): s- block elements can form ionic hydrides. Which on electrolysis in fused state give H_(2) gas at cathode. Reason (R) : s-block elements have low IE and low EN as compared to p-block elements.

If it happens that each orbital can accormmodate 3 electrons (For example electronic configuration of aluminium is 1s^(3) 2s^(3) 2p^(2) , what is the block of the elements with z = 12, 19, 37 when Aufbau rule i) is also valid ii) is not valid?

Class 12 NEET 2020 - Revision In 60 Days | D and F Block Elements Part 1 -Quick Revision | NEET Chemistry | Important Questions

Class 12 NEET 2020 - Revision In 60 Days | D and F Block Elements (Potassium Dichromate) -Quick Revision | NEET Chemistry | Important Questions

In the long or modern form of the periodic table, the element in the periodic table have been divided into four blocks, s-p-d -and f -. Each period begins with the filling of new energy shell. Two series of f -block elements are placed at the bottom of the periodic table. The last element of the p -block in the present periodic table is represented by the configuration, where [X] represents inert gas is

In the modern period table, elements are arranged in order of increasing atomic number which is related to the electric configuration. Depending upon the type of orbitals receving the last electron, the elements in the periodic table have been diviced into four blocks viz s,p,d and f. The modern periodic table consists of 7 periods and 18 groups. Each period being with the filling of a new energy shell. In according with the Aufbua principle, the seven periods (1 to 7) have 2,8, 8, 18, 18, 32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthanodis and actionoids are placed at the bottom of the main body of the periodic table. The last element of p-block in 6th period is represented by the outermost electronic configuration.