Bonding Unit Review

Based on your Reference Tables, the atoms of which of these elements have the strongest attraction for electrons in a chemical bond?

• N

• Na

• P

• Pt

Tags

NGSS.HS-PS1-1

A barium atom attains a stable electron configuration when it bonds with

• one chlorine atom

• two chlorine atoms

• one sodium atom

• two sodium atoms

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which pair of elements below will form a compound with the greatest ionic character?

• Pb and F

• Ca and O

• Na and Cl

• Cs and N

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which statement describes the energy and bonding changes as two atoms of fluorine become a molecule of fluorine?

• Energy is absorbed as a bond is broken.

• Energy is absorbed as a bond is formed.

• Energy is released as a bond is broken.

• Energy is released as a bond is formed.

Tags

NGSS.HS-PS1-4

Which element has metallic bonds at room temperature?

• bromine

• cesium

• krypton

• sulfur

Which statement describes the charge distribution and the polarity of a CH₄ molecule?

• The charge distribution is symmetrical and the molecule is nonpolar.

• The charge distribution is asymmetrical and the molecule is nonpolar.

• The charge distribution is symmetrical and the molecule is polar.

• The charge distribution is asymmetrical and the molecule is polar.

Tags

NGSS.HS-PS2-6

State the shape of this molecule.

• Bent

• Pyramidal

• Linear

• Tetrahedral

Tags

NGSS.HS-PS2-6

The bonds in CO₂ are best described as

• covalent, because valence electrons are shared

• covalent, because valence electrons are transferred

• ionic, because valence electrons are shared

• ionic, because valence electrons are transferred

A substance that has a melting point of 1074 K conducts electricity when dissolved in water, but does not conduct electricity in the solid phase. The substance is most likely

• an ionic solid

• a network solid

• a metallic solid

• a molecular solid

Tags

NGSS.HS-PS1-3

Which substance has nonpolar covalent bonds?

• SiO₂

• SO₃

• Cl₂

• CCl₄