1.3 covalent bonding (b) Lewis structure of molecules and polyatomic Ions

(b) Lewis structure of molecules and polyatomic Ions

Lewis structure are only ——— representations of how the ——— electrons are arranged around individual atoms in a molecule or an ion.

two-dimensional, valence shell

Lewis structure are only two dimensional representations of how the valence shell electrons are arranged around ——- atoms in a ——— or an ———.

individual, molecule, ion

In a Lewis structure, a ——- bond is described by writing each ——— either as a pair of two dots between symbols of two atoms or as a —— connecting them.

covalent, shared electron pair, line

in a ——— structure, a covalent bond is described by writing each shared electron pair either as a pair of ——- between symbols of two atoms or as a line connecting them.

Lewis, two dots

how to draw Lewis structure? explain step by step on note.

total number of valence electrons

shared electrons

the remaining electrons

skeleton

Lewis structure

calculate the total numbers of valence electrons in all atoms to be used in the structure of molecules or ions. For ions, it is necessary to —— electrons to account for negative charges, and —— electrons to account for positive charges.

add, subtract

in skeleton arrangement, select the central atom place the other atoms surrounding the central atom, and connect with a ——- covalent bond (two dots).

single

some molecules that deviate from the octet rule, what are they with example.

1. electron-deficient molecules, NO, BeCl₂, BF₃, BCl₃, AlCl₃

2. expanded valence shell molecules, PF₅, ICl₃, SF₆

the central atom in an electron-deficient molecule has valence electrons of ——- 8, and that in an expanded valence shell molecule has valence electrons of ——8.

less than, more than