LIVE Course for free

Rated by 1 million+ students
Get app now
0 votes
in Science by (160 points)

Kossel postulated alkalies and halogens are separated by noble gases. But they are separated by transition elements then how is that true?

Please log in or register to answer this question.

1 Answer

0 votes
by (15.1k points)

Kössel’s explanation of chemical bonding:

  1. Noble gases separate the highly electronegative halogens and the highly electropositive alkali metals.
  2. Halogens can form negatively charged ions by gaining an electron. Whereas alkali metals can form positively charged ions by losing an electron.
  3. These negatively charged ions and positively charged ions have a noble gas configuration that is 8 electrons in the outermost shell. The general electronic configuration of noble gases (except helium) is given by ns2np6.
  4. As unlike charges attract each other these unlike charged particle are held together by a strong force of electrostatic attraction existing between them. For example, MgCl2, the magnesium ion and chlorine ions are held together by force of electrostatic attraction. This kind of chemical bonding existing between two unlike charged particles is known as electrovalent bond.

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.