04 Sulphutic Acid सल्फयूरिक अम्ल बनाने की विधि chap 07p Block elements || Class 12th

In the modern periodic table, elements are arranged in order of increasing atomic numbers, which is related to the electornic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, viz, p,d and f. The modern periodic table consists of 7 periods and 18 groups. Each period begins with the filling of a new energy shell. in accordance with the Aufbau principal, 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 lanthanoids and actinoids, are placed at the bottom of the main body of the periodic table The last element of the p-block in 6th period is represented by the outermost electronic configuration

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.

Wxplain the following giving suitable reson. (a). Transitin metals of 3d-series doe not react readily with dilute acids to liberate hydrogen although they have high negative reduction potential values. Explain. (b). The atomic radii of the elements in a transition series do not vary much while they do vary in the case of s and p-block elements. Explain. (c). The second and third members in each group of the transition elements group of the transition elements have similar atomic radii. Explain.

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?

ऑक्सोएसिड्स नाइट्रोजन |नाइट्रिक अम्ल बनाने की ओस्टवाल्ड विधि |HNO3 . की एकाग्रता|HNO3 . की एकाग्रता|प्रयोगशाला विधि |सधूम नाइट्रिक अम्ल |भौतिक गुण |रासायनिक गुण |धातुओं के साथ अभिक्रिया|OMR|Summary

दोहरान |विरंजक चूर्ण|विरंजक चूर्ण का उपयोग|विरंजक चूर्ण की कार्बन डाइऑक्साइड से अभिक्रिया |विरंजक चूर्ण की सल्फ्युरिक अम्ल से अभिक्रिया |बेकिंग सोडा |बेकिंग सोडा बनाने की विधि |बेकिंग सोडा का उपयोग|सारांश

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

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