Carbon and graphite are allotropes of Carbon. Between graphite and diamond, which one is a good conductor of electricity and which one is not?
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3.) Carbon and graphite are allotropes of Carbon. Between graphite and diamond, which one is a good conductor of electricity and which one is not? Support answer with an explanation. (Limit answer to not more than 4 sentences)
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- 4.) Carbon and graphite are allotropes of Carbon. Between graphite and diamond, which one is a good conductor of electricity and which one is not? Support answer with an explanation. (Limit answer to not more than 4 sentences)(a) Answer parts i), i),ii) and iv) side by side so that the relative scales are obvious, include electron occupancy. (i) Draw the band structure of potassium (ii) Draw the band structure of silicon (iii) Draw the band structure of carbon (iv) Draw the band structure of germanium (b) Based on your diagrams, state the order of electrically conductivity for the four elements at 300 K, from the smallest to the highest - explain your choice. Magnesium has an electron configuration of 1s? 2s? 2p° 3s?. Using band diagrams explain why this element is considered an (c) electrical conductor. (d) improve its ability to conduct electricity. What type of extrinsic semiconductor results and explain how the addition of arsenic increases conductivity (use diagrams if necessary)? A small amount of arsenic is added to a sample of silicon to (i) Gallium phosphide (GaP) has a band gap of 2.26 eV. Calculate the wavelength of light emitted in nm (1 eV = 1.6 x 1019 J). (e) (ii) It is required for a…In how many allotropic forms does arsenic exists?
- In how many allotropic forms does nitrogen exists?(b) Shown below are two schematic band diagrams for silicon. Answer the following questions: (i) For phosphorous-doped silicon, draw a dashed line denoting the location of the additional state(s) created by the phosphorus at room temperature. Explain your answer. (ii) For phosphorous-doped silicon, draw a dashed line denoting the location of electrons donated by the phosphorus at room temperature. Explain your answer. Conduction Conduction band band Band Band дар gap Valence Valence band band (i) (ii)Are allotropes different from polymorphs with respect to Carbon? Give reason for your answer.
- Provide complete solution. Determine the planar density of the Mo in (110) given than the atomic radius is 0.154 nm. Express the final answer in atoms per nm^2 and in tenths decimal place.is mesosphere solid or liquid?For each of the following pairs of substances, predict which will have the higher melting point, and indicate why: (a) B, BF3; (b) Na, NaCl; (c) TiO2, TiCl4; (d) LiF, MgF2.
- One of the allotropes of sulfur is a ring of eight sulfur atoms. Draw the Lewis structure for the S8ring. Comment on whether that ring will be planar or not.b.The S8ring can be oxidized to produce S8O, in which the oxygen atom is bonded to one of the sulfur atoms and the ring is intact. Draw the Lewis structure for S8O and comment onwhether this oxidized ring will be planar or not.(a) Why does Li Cl acquire pink colour when heated in Li vapours? (b) A solid with cubic crystal is made of two elements ‘P’ and ‘Q’ Atoms of ‘Q’ are at the comers of the cube and ‘P’ at body centre. What is the formula of compound?122 CHAPTER 5ID 15. Which of the following best describes the particle-level bonding in a crystal of KBr? iupil doiw (A) alternating positive and negative metal ions in a crystal lattice framework. (B) positive and negative ions in fixed position in a crystal lattice framework. (C) mobile valence electrons shared between positive metal ions. (D) metallic and nonmetallic atoms covalently bonded in a 3-dimenional framework. () HO (C) CC (D) CH'OE Questions 16-17 use the following information. 6801 9010 oloegsini doidW8 H H H---H H H Ethane wolod a (B) но-с-Сн, — СH, — СH, — СH, ннн нннн H-C-C- C-C-C-C-C-H || | | I|| Η Η Η Η | H. нн Heptane Pentanoic Acid 10 Name Chemical Formula Molar Mass (g/mole) Boiling Point (°C) Ethane 30.07 -88.5 Heptane 16 100.20 98.1-98.7 Pentanoic Acid 102.13 186-187 16. Heptane and pentanoic acid have very similar molar masses, but pentanoic acid has a significantly higher boiling point. Which of the following statements best helps explain this observation? (A)…