Question

6. How do you know the number of covalent bonds between two nonmetals? (based on the number of electrons they need to meet the octet. For example: nitrogen has 5 valence electrons, it needs another three valence electrons to become 8. Two Natoms share three pairs of electrons and they form triple bond. O2: double bond, halogen: single bond.) 7. How many valence electrons that an element need to form a negative ion? (to see how many valence electrons to reach the octet: for example, nitrogen has 5 valence electrons and it needs another 3 valence electrons to reach octet, it needs 3 valence electrons to form N ion. O needs 2 valence electrons to form 02 ion etc.

Answer 1

solution :- 6 Electron present in the outermost shell of an atom called valence electron. Examples > 2,8,7 So in Cl atom 7 electron is present in the outermost shell. hence, No. of valence election in a=7 so clatom need l electron to complete their outer most coneit. In chlorine molecule (C2) each atom of chlorine need one electron to complete their out most on leit so It has one covalent bond. The number of pairn of electrons shared between two atoms determines the number of covalent bonds each clatem :..äSen :ci..C: > chce Similarly N 2,5 no. of valince electron in N=5 so it require 3 more electrons to complete their outernost orbit. so in Nz3 covalent bond will form. On each Natom NO :N ekectron each Ceo shari thrill, :N -> NEN So we need to check how many electrons they had to meet the outent

Solution 6 As we know, The electron present in the outermost shell of an atom called valence electron ... incl = ?,8,7 (2n rule to where na Shell number) k shell 2011=2, shell 2(2) = 8 9 so chlarine need I electron to complete outer most orbit. so it needs lelectron to reach the octent. 1 ē te u 17 Protons in electrons Zero charge o 17 Pretons o 18 electrons o -l overall Oo . Charge outer N = 2,5 So Nitrogen aton need 3 electrons to complete most conleit. sét N N3 Terotons electrons Zerocharge 7 Pretons To electrons -3 overall change 13 So we had to check how many valence electron rated to reach - the sectent..