MCDB 1150 Test 1
Covalent bonding - Correct Answers -bonding between atoms by sharing electrons
electronegativity - Correct Answers -A measure of how tightly an atom holds its
electrons (closeness to the nucleus)
What qualities of an atom make it more electronegative - Correct Answers -1) more
protons (more positive charge in the nucleus); 2) fewer electron shells (closer to the
nucleus)
Put the following atoms in order of decreasing electronegativity: H, C, O, N, F - Correct
Answers -F>O>N>C=H
Which is more electronegative, F or Cs? - Correct Answers -F since it has fewer
electron shells
, Polar covalent bonds - Correct Answers -bonds between atoms of different
electronegativity. The more electronegative atom will hold the electron closer to it than
the other. Examples are O-H, N-H, F-H, C-O, C-N, and F-N bonds
What are the characteristics of molecules that contain polar covalent bonds? - Correct
Answers -They are hydrophilic and polar and chemically reactive.
Nonpolar covalent bonds - Correct Answers -bonds between atoms of same or similar
electronegativity. The electrons are located in the middle of the two. Examples are H-H
bond and C-H bond
What are the characteristics of molecules that contain nonpolar covalent bonds? -
Correct Answers -They are hydrophobic, nonpolar, and chemically inert (nonreactive).
Dipole - Correct Answers -partial charge on a molecule
Covalent bonding - Correct Answers -bonding between atoms by sharing electrons
electronegativity - Correct Answers -A measure of how tightly an atom holds its
electrons (closeness to the nucleus)
What qualities of an atom make it more electronegative - Correct Answers -1) more
protons (more positive charge in the nucleus); 2) fewer electron shells (closer to the
nucleus)
Put the following atoms in order of decreasing electronegativity: H, C, O, N, F - Correct
Answers -F>O>N>C=H
Which is more electronegative, F or Cs? - Correct Answers -F since it has fewer
electron shells
, Polar covalent bonds - Correct Answers -bonds between atoms of different
electronegativity. The more electronegative atom will hold the electron closer to it than
the other. Examples are O-H, N-H, F-H, C-O, C-N, and F-N bonds
What are the characteristics of molecules that contain polar covalent bonds? - Correct
Answers -They are hydrophilic and polar and chemically reactive.
Nonpolar covalent bonds - Correct Answers -bonds between atoms of same or similar
electronegativity. The electrons are located in the middle of the two. Examples are H-H
bond and C-H bond
What are the characteristics of molecules that contain nonpolar covalent bonds? -
Correct Answers -They are hydrophobic, nonpolar, and chemically inert (nonreactive).
Dipole - Correct Answers -partial charge on a molecule
