Simple Molecules and Extended Structures

A substance has low melting and boiling points. What kind of bonding is it likely to contain?

• Giant ionic

• Giant covalent

• Giant metallic

• Simple covalent

Tags

NGSS.HS-PS1-1

Simple covalent structures have low melting and boiling points because:

• Weak covalent bonds are broken

• Strong covalent bonds are broken

• Weak intermolecular forces of attraction are broken

• Strong intermolecular forces of attraction are broken

What is the correct formula for this molecule?

• NH
• N₃H
• NH₃
• NH₄

Compared to ionic compounds, molecular compounds generally have...

• good conductivity
• greater densities
• more chemical bonds
• a low boiling point

Compared to ionic compounds, molecular compounds generally have...

• stronger chemical bonds
• poor conductivity
• a high melting point
• lower densities

What part of an atom is involved in chemical bonding?

• protons
• neutrons
• electrons
• nucleus

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Low melting point and low solubility in water are general properties of ______________________ compounds

• ionic
• covalent
• chemical
• glucose

Most covalent compound do not exist in which state?

• solid

• liquid

• gas

Which of these substances have weak intermolecular forces hence low boiling points?

• Sodium Chloride
• Copper
• Buckminster fullerene
• Methane
• Sand

Write the formula for:
dinitrogen tetroxide

• N₂O₄
• NO₂
• NO
• N₄O₈