Chemical Bonds & Electronegativity Lesson

Question 1

attractive force that holds atoms together

Answer 1

chemical bond

Question 2

biologically weak, dissolve in water

Answer 2

ionic bond

Question 3

2 or more non metals, biologically strong

Answer 3

covalent bond

Question 4

ability of an atom to attract
electrons to itself when forming a bond

Answer 4

electronegativity

Question 5

elements with a valence shell that is almost full

Answer 5

non metals

Question 6

elements with one or two valence electrons

Answer 6

metals

Question 7

non metals are ___ electronegative than metals

Answer 7

more

Question 8

larger the electronegativity number (En), the ___ the atom attracts the electrons

Answer 8

stronger

Question 9

electronegativity ____ across a period on the periodic
table

Answer 9

increases

Question 10

electronegativity ____ down a group/family

Answer 10

decreases

Question 11

En = 0

Answer 11

noble gases

Question 12

the difference between
two atoms in a bond

Answer 12

electronegativity difference (∆En)

Question 13

the electronegativity number of both atoms is the same ,
meaning that the electron pair is shared equally

Answer 13

∆En = 0

Question 14

the atom that attracts the electron pair more strongly has a

Answer 14

partial negative charge ( -)

Question 15

atom that attracts the electron pair more weakly has a

Answer 15

partial positive charge ( +)

Question 16

∆En = 0 to 0.5, relatively equal sharing of the electron pair between atoms

Answer 16

Non-Polar Covalent Bond

Question 17

diatomic molecule such as CH4 and O2 is classified as a

Answer 17

Pure Covalent Bond

Question 18

∆En = 0.5 to 2.0, electrons are NOT equally shared between atoms, biologically strong

Answer 18

Polar Covalent Bond

Question 19

∆En = 0

Answer 19

pure covalent

Question 20

∆En = 0.1 to 0.5

Answer 20

nonpolar covalent

Question 21

∆En = 0.5 to 1.6

Answer 21

polar covalent

Question 22

∆En = 1.6 to 2.0, has a metal

Answer 22

ionic

Question 23

∆En = 1.6 to 2.0, no metal

Answer 23

polar covalent

Question 24

∆En = 2.1 to 4.0

Answer 24

ionic

Question 25

single hydrogen atom is shared between two electronegative atoms

Answer 25

Hydrogen Bond

Question 26

Occur between groups that are insoluble in water, non-polar groups clump together in water

Answer 26

Hydrophobic Interactions