Covalent Bonds

Question 1

What’s a Covalent Bond?

Answer 1

attraction between atoms from the sharing of electrons
~ a chemical bond formed when electrons are shared between atoms

• involves electrostatic attractions between the positively charged nuclei and the negatively charged electrons
• if the electronegativity of 1 of the 2 atoms that are bonded together is greater than the electronegativity of the other atom, the electrons will be attracted more strongly to the first atom

Question 2

What’s a Polar Covalent Bond?

Answer 2

a covalent bond in which electron distribution is unequal
~ a covalent bond formed between two atoms with significantly different electronegativities

Question 3

What do polar bonds have

Answer 3

a positive pole and a negative pole
~ ex. dipole bonds

Question 4

What does ΔEN stand for

Answer 4

electronegativity differences

Question 5

How do you know if a bond is ionic, polar covalent, etc.?

Answer 5

you know from the ΔEN

ΔEN > 1.7 = mostly ionic
ΔEN is between 0.4 - 1.7 = polar covalent
ΔEN < 0.4 = slightly polar covalent
ΔEN = 0 –> non polar covalent

Question 6

What are coordinate covalent bonds?

Answer 6

a covalent bond in which both electrons come from the same atom