A: have high melting and boiling points.
B: are soluble in water
C: can conduct electricity
D: shatter easily
举一反三
- Ionic bonded materials are characterized by the following properties except . A: hard B: brittle C: conductor D: high melting temperature
- The solubility of ionic compounds is associated with the lattice energy, the higher the lattice energy, the more soluble the ionic compound.
- IT can be inferred from the passage that Europa and Antarctica have in common which of the following（） A: Both appear to have a surface with many craters B: Both may have water beneath a thin,hard surface C: Both have an ice can that is melting rapidly D: Both have areas encased by a rocky exterior
- It can be inferred from the passage that Europa and Antarctica<br/>have in common which of the following? ___ A: Both appear to have a surface with many craters. B: Both may have water beneath a thin, hard surface. C: Both have an ice can that is melting rapidly. D: Both have areas encased by a rocky exterior.
- Coumarin<br/>compounds can be extracted by the following methods except __. A: Solvent extraction B: Maceration with cold water C: Extract with alkaline and precipited with acid D: Steam Distillation E: Sublimation
内容
- 0
Which of the compounds below have bonds that are predominantly ionic?() A: KCl B: CF4 C: NH3 D: both A and B E: both B and C
- 1
Water engineering can be used in the following ways except _________.
- 2
Which statement of the following is false according to the passage A: The boiling point of water on a mountain three kilometers high is only 90 Celsius. B: It would take you longer to cook potatoes in boiling water on the mountain than it would at sea level. C: When the temperature of a liquid is raised enough, the liquid boils. D: The boiling point of water on a mountain six kilometers high is 95 Celsius.
- 3
An ionic crystal consists of cations and anions, therefore, the ionic crystal can conduct electricity.
- 4
We can present the main points by employing the following orders except _______.