chemistry

posted by .

1)RuO2 is molecular, but why is it insulator even though Ru is metal?

2)Why is TiO ionic? I thought only group 1 and 2 would make ionic compound

3)If the the compound has metal and metalloid like GaAs, is it always semiconductor

  • chemistry -

    For the same reason most oxides are not conductors. Metals conduct electricity because the electrons in metals are "a sea of electrons" that can move freely. When you make a compound, like an oxide (Al2O3, RuO2, CuO, Na2O, just name almost anything), those electrons are tied up.

    2. Ti has an electronegativity of about 1.5 and that of oxygen is about 3.5; therefore, the difference is about 2 on a scale where 1.9 is about the 50-50 mark for covalent vs ionic compounds. Generally we all those compounds with a difference greater than 1.8 or 1.9 ionic although they would more correctly be called polar covalent. TiO2, however, is more ionic that it is covalent.

    3. Those metals near the stair step between metals and non-metals on the periodic table are the semiconductors (As, Ge, Ga, Si, etc).

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    Which of the following describes the compound Mn(NO2)2?
  2. chemistry

    Many ionic compounds have high melting points because a lot of energy is required to break the strong ionic bonds. So after breaking the ionic bonds, the ionic compound becomes a liquid. How do you explain why the ionic compound also …
  3. chemistry

    what if compound has those metalloids(metal near stair case) with gas element, is it going to be semiconductor. Can you think of any other compound with metalloid and gas elements beside SiO2 that is insulator
  4. Chemistry 106

    An unidentified metal forms an ionic compound with the carbonate anion. The metal forms a 2+ cation. If the minimum ration of the number of protons in the metal to the oxygen protons s 5:6, what is the metal?
  5. chemistry

    When compared to compound B, compound A has lower melting and boiling points and vaporizes more readily. Is compound A an ionic compound or a molecular compound?
  6. Physical Science

    10. The more compact a metal is, the less brittle it becomes. -True?
  7. Physical Science

    10. The more compact a metal is, the less brittle it becomes. -True?
  8. Science urgent

    1. Explain why the melting points of ionic compounds and molecular compounds differ?
  9. Science to: DrBob222

    1. Explain why the melting points of ionic compounds and molecular compounds differ?
  10. Chemistry

    An unknown metal, m, forms an ionic compound with the formula, M2S3. Which formula represents the compound formed by the metal with oxygen?

More Similar Questions