cem 141 MSU exam 3

isomers have the same form, just different connectivity

• true

• false

what are some characteristics of Sigma bonds?

• Sigma bonds allow for free rotation of bonds.

• Sigma bonds have no rotational freedom.
• Sigma bonds are formed by side-to-side overlap of orbitals.

  (p-p)

• Sigma bonds are formed by end-end overlap of orbitals. (sp-sp)

What are some characteristics of Pi bonds

• Pi bonds are characterized by sideways overlap of the orbital. (p-p)

• Pi bonds are formed by head-on overlap of s orbitals.
• Pi bonds do not rotate freely around the bond axis.

• Pi bonds allow free rotation around the bond axis.

what do double bonds contain?

• One Sigma bond and 1 Pi bond.

• 2 Sigma bonds and 2 Pi bonds.

• 1 sigma bond and 2 Pi bonds.

• No shared electrons

Is there restricted rotation around double bonds?

• Yes

• No

What do triple bonds contain?

• 2 sigma bonds, 1 pi bond

• 1 sigma bond, 2 pi bonds

• 1 pi bond, 1 sigma bond

• 3 sigma bonds

Lone pairs, single bonds, double bonds, and triple bonds all count as ONE electron center.

• TRUE

• FALSE

Nuclear charge decreases across the row.

• False

• True

nuclear charge increases down a group

• True

• False

Covalent bonds are...

• Covalent bonds are between molecules.

• Covalent bonds are formed by the transfer of electrons between atoms.
• Covalent bonds are inside molecules.

• Covalent bonds involve the complete loss of electrons from one atom to another.

Tags

NGSS.HS-PS1-1