why is ethane a nonpolar covalent bond? I get that it is because they have "equal" shared valence electrons- but how do we know that? It seems they are on opposite sides of the periodic table, so I thought they have vastly different electronegativity

= Deciding whether a Lewis structure satisfies the octet rule Decide whether these proposed Lewis structures are reasonable. proposed Lewis structure a-o :O: : 0: [×—8]¯ ! O Yes. O No, it has the wrong number of valence electrons. The correct number is: Is the proposed Lewis structure reasonable? No, it has the right number of valence electrons but doesn't satisfy the O octet rule. The symbols of the problem atoms are:* 0 O O O O Yes. No, it has the wrong number of valence electrons. The correct number is: O No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* U Yes. No, it has the wrong number of valence electrons. The correct number is: O No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are:* * If two or more atoms of the same element don't satisfy the octet rule, just enter the chemical symbol as many OD — 3/5 I

Deciding whether a Lewis structure satisfies the octet rule.

Draw three resonance structures for CS,. This species has its three atoms bonded sequentially in the following fashion: S-C-S. Draw your resonance structures so that the atoms in them are bonded together in this order. Select the most important resonance structure for this species based on the formal charges on the atoms of the three resonance structures you have drawn. Select the choices from below which make the statements true about this (most important) resonance structure. (a) The leftmost bond (between S and C) is a single v bond. (b) The rightmost bond (between C and S) is a single v bond. (c) The formal charge on the leftmost (S) atom is -Select-v (d) The formal charge on the central (C) atom is -Select---v (e) The formal charge on the rightmost (S) atom is Select-v (f) The number of nonbonding pairs (lone pairs) of electrons in the leftmost (S) atom is Select-v pairs. (g) The number of nonbonding (lone) pairs of electrons in the rightmost (S) atom is -Select-- v pairs.