to which electronic shell an incoming electron would go in the case of element belonging to 1st period?
Answers
(a) two shells, both of which are completely filled with electrons: Only noble gas elements has completely filled orbitals. Neon(10)=2,8 has two shells, both of which are completely filled with electrons.
(b) The element with electronic configuration 2,8,2 has atomic number =12. The element is Mg Magnesium.
(c) A total of three shells, with four electrons in its valence shell. The electronic configuration is =2,8,4. Atomic number=14. Element is Si Silicon.
(d) A total of two shells, with three electrons in its valence shell. electronic configuration is =2,3 Atomic number =5. The element is B Boron.
(e) Twice as many electrons in its second shell as in its first shell. The first shell can have maximum 2 electrons. Therefore the electrons in second shell =4. Atomic number is =6. The element is C Carbon.
K shell
Explanation:
it will go to hydrogen (belonging to 1st period) . helium is already attained stability of duplet . hydrogen has 1 electron in its outermost shell so after accepting 1 electron it will attain duplet and become stable