2. Chemistry

When two atoms share a pair of electrons, the bonding is referred to as:

What makes a covalent bond nonpolar?

If a covalent bond is polar:

Bonds between two atoms that are equally or similarly electronegative are ________.

The hydrogens and oxygen of a water molecule are held together by ______ bonds.

Which of the following occurs when a covalent bond forms?

a. Electrons in valence shells are transferred from one atom to another.

b. Electrons in valence shells are shared between atoms.

c. Partial charges on polar molecules interact.

d. Nonpolar molecules are pushed together.by surrounding water molecules.

Which of these molecules would you predict to have the largest number of polar covalent bonds based on their molecular formulas?

a. C₂H₆O(ethanol)

b. C₂H₆(ethane)

c. C₂H₄O₂(acetic acid)

d. C₃H₈O (propanol)

The atomic number of sulfur is 16. Sulfur combines with hydrogen by covalent bonding to form a compound, hydrogen sulfide. Based on the number of valence electrons in a sulfur atom, predict the molecular formula of the compound.

a. HS

b. HS₂

c. H₂S

d. H₄S

The atomic number of sulfur (S) is 16. Sulfur combines with hydrogen by covalent bonding to form a compound, hydrogen sulfide. Based on the number of valence electrons in a sulfur atom, predict the molecular formula of the compound. (Explain your answer.)

a. HS

b. H₂S

c. H₄S₂

d. H₄S

In terms of electron sharing between atoms, compare nonpolar covalent bonds, polar covalent bonds, and ions.

Which of the following occurs when a covalent bond forms?

a. Electrons in valence shells are transferred from one atom to another.

b. Electrons in valence shells are shared between atoms.

c. Partial charges on polar molecules interact.