Why Is Calcium Fluoride, Ca , a High Melting

question 32

Multiple Choice

Why is calcium fluoride, Ca , a high melting point crystalline solid while tin (IV) chloride, , is a volatile liquid?

• A)There is no theory to predict the physical property of melting point. Melting point temperatures are empirically determined.
• B)Actually, we would predict these results to be the opposite. Since each metal is combined with a group 17 halogen, the heavier metal (tin)combination should have the higher melting point.
• C)Ca is a small, linear, non-polar molecule, while is a huge tetrahedral structure. Therefore the bonds in calcium fluoride tend to give it a higher melting point temperature.
• D)Ionic compounds formed by elements on opposite sides of the periodic table, like , tend to have higher melting points than more covalently bonded structures, like .

Learn how to effectively use slide transitions and builds to enhance presentation delivery.

Recognize the importance of using active voice and clear, concise language on slides.

Master the skill of adapting graphics, including charts and graphs, for clearer slide presentations.

Understand how to effectively organize a presentation using agenda, bumper, and navigation slides.

---

Definitions:

Avoidance Conditioning

A response that prevents the occurrence of a punisher. This increases the probability of a low-occurring response and maintains that response at a high level. The principle of avoidance conditioning states that a behavior will increase in frequency if it prevents a punisher from occurring.

Yelled At

The act of raising one’s voice in a sharp, often aggressive manner, typically as a form of reprimand or expression of frustration towards someone.

Party

A social gathering of invited guests, typically involving eating, drinking, entertainment, and often celebrating a specific occasion.

Superstitious Behavior

Actions repeated because they are believed to lead to positive outcomes, without a logical cause-and-effect relationship.