True or False, Chemistry Bonding!?

Question

True or False
1. Nonpolar covalent bonds have a low ionic character.
2. Atoms tend to form bonds so that each atom has 12 electrons in its highest energy level.
3. Long covalent bonds have more energy than short covalent bonds.
4. Multiple covalent bonds usually have less energy than single covalent bonds.
5. A hydrogen atom is attracted to an unshared pair of electrons with London forces.
6. Nonmetals are usually more electronegative than metals.
7. When drawing a Lewis structure, the most electronegative atom is placed in the center (except for hydrogen).
8. Lattice energy is the energy released when an ionic crystal forms. It is greater than the energy needed to break the crystal apart.

Answer 1

1. True, in fact if they're non polar then they're not ionic at all
2. False, most atoms obey the octet rule - 8electrons
3. False, the bond length is indicative of how strong the bond is, short bonds are strong and require lots of energy to break
4. False, N2 which has a triple bond is much much stronger than H2 which has a single bond
5. False. A hydrogen atom (im assuming its positively charged) is attracted to a lone pair of electrons by hydrogen bonding
6. True, metals are electropositive
7. Never ever heard about this convention, in fact no, it really doesnt matter how you draw a lewis structure as long as its clear and all the bonds/lone pairs are in the right place. Take CF4 for instance, F is the most electronegative, you dont draw it in the middle. False. Stupid and false.
8. True and false. Yes lattice energy is the energy released upon crystal formation. No, it is not greater than the energy required to break the crystal apart, they're opposite processes, the energy is the same.

hope this helps

Answer 2

1) True
2)False 8 electrons
3)False
4)false
5)False coordinance
6)yes (usually, there are exceptions)
7)do not know
8)do not know


i could not answer to all, Look others but i am sure of my answers