Chemistry- structure and properties Exam
Questions With Correct Answers.
Ionic lattice - answerAn ionic compound is a giant structure of ions. The ions have a regular,
repeating arrangement called an ionic lattice.
How is an ionic lattice formed? - answerThe lattice is formed because the ions a...
Chemistry- structure and properties Exam
Questions With Correct Answers.
Ionic lattice - answer✔An ionic compound is a giant structure of ions. The ions have a regular,
repeating arrangement called an ionic lattice.
How is an ionic lattice formed? - answer✔The lattice is formed because the ions attract each
other and form a regular pattern with oppositely charged ions next to each other.
What's the ionic lattice held together by? - answer✔An ionic lattice is held together by strong
electrostatic forces of attraction between the oppositely charged ions.
What direction do the forces act in, in an ionic lattice? - answer✔The forces act in all directions
in the lattice. This is called ionic bonding.
Models to represent giant ionic structures:two dimensional space-filling model - answer✔the
two-dimensional space-filling model clearly shows the arrangement of ions in one layer, but it
does not show how the next layer of ions is arranged
Models to represent giant ionic structures:Three dimensional ball and stick diagram -
answer✔the three-dimensional ball and stick model shows the arrangement of ions in a larger
section of the crystal, but using sticks for bonds is misleading because the forces of attraction
between ions actually act in all directions
Models to represent giant ionic structures:three dimensional model (misleading) - answer✔the
three-dimensional model is also misleading because it shows lots of free space between the ions,
which there isn't
Properties of ionic compounds - answer✔High melting points and boiling points
Conducting electricity
Ionic compound state at room temperature - answer✔Ionic compounds have high melting and
boiling points, so they are in the solid state at room temperature
Properties of ionic compounds- high melting and boiling points-what must be transferred to a
substance to make it melt or boil? - answer✔Energy must be transferred to a substance to make
it melt or boil.
it contains charged particles, such as ions, and
these particles are free to move from place to place
Properties of ionic compounds -conducting electricity-When can an ionic compound conduct
electricity - answer✔An ionic compound can conduct electricity when:
it has melted to form a liquid, or
it has dissolved in water to form an aqueous solution
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