Molecular Polarity (H Bonding and Solubility)

What kind of molecules are water and butter, respectively?  

• Polar, nonpolar 

• Nonpolar, polar

• Polar, polar 

What is electronegativity?

• The ability of an atom to lose electrons.

• The ability of an atom to attract protons.

• The ability of an atom to lose protons.

• The ability of an atom to attract electrons.

Which element has the highest electronegativity?

• Bromine (Br)

• Oxygen (O)

• Fluorine (F)

• Francium (Fr)

What does the minimum difference in electronegativity for a bond to be considered polar?

• 0.5

• 1

• 0.9

• 1.4

When a molecule has a partially positive side and a partially negative side, what is it called? 

• An ion 

• A dipole 

• An ionic solid 

The range of electronegativity for polar molecules is 0.5-1.6. What type of bond is present if the electronegativity difference is greater than 1.6 and the elements involved are a metal and a nonmetal?

• Ionic 

• Nonpolar Covalent 

• Polar Covalent 

What is a dipole moment?

• When electrons are unevenly spread around the molecule, leading to a more positive area and a more negative area.

• When electrons are evenly spread around the molecule.

Ionic bonds occur between what kinds of elements?

• Metals

• Nonmetals

• Metals and Nonmetals

Why do the oxygen sides of water molecules align themselves with the hydrogen sides of neighboring water molecules? 

• Because they have the same charge so they attract

• Because they have a partial negative charge so they are attracted to hydrogen's partial positive charge

• Because they have a partial positive charge so they are attracted to hydrogen's partial negative charge

• Because there is no difference in the electronegativity of oxygen and hydrogen 

What causes Surface Tension?

• Cohesive Forces

• Tension Forces

• Gravity

• Strong Nuclear Force