The properties of ionic crystals reflect the strong interactions that exist between the ions. They are very poor conductors of electricity, have strong absorption of infrared radiation, and are easily cleaved. These solids tend to be quite hard and have high melting points.
Which solid is poor conductor of heat and electricity?
Molecular solids are poor conductors of heat and electricity and they have lower melting point than ionic solids.
Which compound is most likely soft a poor conductor of electricity and has a low melting point *?
Explanation: Covalent compounds have low forces of attraction between their molecules (i.e. one H2O molecule isn’t as attracted to another H2O molecule than the oppositely charges ions are in an ionic compound). Little energy is needed to break their bonds, therefore they have low meting points.
Which one of the following elements is a poor conductor of heat and electricity?
Nonmetals are (usually) poor conductors of heat and electricity, and are not malleable or ductile; many of the elemental nonmetals are gases at room temperature, while others are liquids and others are solids. The metalloids are intermediate in their properties.
Which substance conducts electricity in a liquid state but is a poor conductor in the solid state?
In the solid state, ionic compounds such as sodium chloride have their ions fixed in position and therefore these ions cannot move so solid ionic compounds cannot conduct electricity. However in the molten state, ions in ionic compounds are free to flow and therefore molten sodium chloride can conduct electricity.
What are poor heat conductors?
Metals and stone are considered good conductors since they can speedily transfer heat, whereas materials like wood, paper, air, and cloth are poor conductors of heat. These conductive properties are rated based on a “coefficient” which is measured relative to silver.
Which is the poor conductor of electricity?
Materials that are poor conductors of electricity are called insulators. Some examples are wood, glass, plastics, non-metal elements that are polymers of hydrocarbons.
Which compound has low melting and boiling point and non conductor of heat and electricity?
Covalent compounds generally have low boiling and melting points, and are found in all three physical states at room temperature. Covalent compounds do not conduct electricity; this is because covalent compounds do not have charged particles capable of transporting electrons.
Which compound has low melting point and soft?
– The solid SO2 has a melting point of -72°C which is the lowest in the given options. – SO2 is also a covalent compound and hence it is soft. – NaCl is a crystalline solid and it has a melting point of 801°C. – Water is a hydrogen-bonded solid and it has a melting point of 0°C.
What is a poor conductor in solid form?
Ionic solids—Made up of positive and negative ions and held together by electrostatic attractions. They’re characterized by very high melting points and brittleness and are poor conductors in the solid state. An example of an ionic solid is table salt, NaCl.
Is sodium poor conductor of heat and electricity?
Answer Expert Verified
The metal sodium is indeed a good conductor of heat and electricity.
Is zinc a poor conductor of electricity?
ScienceViews.com explains that “Zinc is a blue-gray, metallic element, with the atomic number 30. At room temperature, zinc is brittle, but it becomes malleable at 100 C. Malleable means it can be bent and shaped without breaking. Zinc is a moderately good conductor of electricity”.
Which of the following is poorest conductor of heat?
The correct answer is Lead. Among metals: Copper & Zinc are good conductors. Mercury metal is a poor conductor while Lead is the poorest conductor.