HW #2 Properties of ionic compounds

Which of the following is a property of an ionic compound?

• high melting point
• soft
• malleable
• liquid at room temperature

Tags

NGSS.HS-PS1-3

Which of the following statements explains why ionic compounds are brittle?

• When a force is applied to the crystal, the strong electrostatic interactions cause similar ions to repel and shatter the crystal lattice.
• When a force is applied to the crystal, the strong electrostatic interactions cause similar ions to attract and shatter the crystal lattice.
• When a force is applied to the crystal, the weak electrostatic interactions cause opposite ions to attract and shatter the crystal lattice.
• When a force is applied to the crystal, the weak electrostatic interactions cause similar ions to repel and shatter the crystal lattice.

In a lattice structure oppositely charged ions :

• Will repel
• have a strong electrostatic attraction

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

Ionic compounds have high melting points because

• An ionic lattice is a repeating pattern of ions with an ordered structure
• The ions cannot move
• a large amount of energy is required to break the ionic bonds in the lattice 
• There are no free electrons

Tags

NGSS.HS-PS1-3

Ionic compounds can conduct electricity as a solid

• true
• false

Which of the following is a characteristic property of ionic compounds?

• They form hard, brittle crystals with characteristic shapes
• They have low melting points
• They have low boiling points
• They contain no charged particles

Tags

NGSS.HS-PS1-3

In what form can an ionic compound conduct electricity?

• when dissolved in water
• as a solid
• as a crystal
• when warmed slightly

The following properties are all characteristics of ionic compounds EXCEPT

• high melting and boiling points

• soft

• crystal lattice structure

• conduct electricity when dissolved in water

Tags

NGSS.HS-PS1-3

Compounds composed of a ______________ and _____________ like the compound CaCl₂ , are ionic compounds.

• metal ... metal

• nonmetal ... nonmetal

• metal ... nonmetal

Tags

NGSS.HS-PS1-2

Where are the non-metals located on the periodic table?

• All over
• On the left side of the "staircase"
• On the right side of the "staircase"