Explain the following: a)Why the melting point increases from lithium to beryllium in Period 2, Why graphite conducts electricity but diamond does not f)Why the melting point decreases in the order fluorine > oxygen > nitrogen > neon g)Why the melting point
5/9/2008· Graphene only conducts electricity very well down the sheet. It can''t conduct electricity well from the top to bottom direction. Since fullerenes are spheres, conducting in any direction outside of the sphere would be "top to bottom".
In graphite structure, two of them make two single (sigma) bonds while the other pair form a double bond (consists of one sigma and one pi bond). Electron that forms pi bond is freer to travel between atoms compared to the others and is theoretically associated with all adjacent atoms (imagine the 3d structure of graphite) rather than a single atom.
Graphite conducts electricity. Explain. Asked by Topperlearning User | 14th Aug, 2014, 11:46: AM Expert Answer: Graphite has delocalised Π electrons which are relatively free to move under the influence of electric field.Therefore graphite is a good conductor of
(2) (b) €€€€Draw a ring around the type of bond which holds the atoms together in each layer. € (1) (Total 3 marks) € covalent ionic metallic Q3. This question is about lithium and sodium. (a) €€€€Use the Chemistry Data Sheet to help you to answer this question.
Graphite is used for the contacts in electric motors because it conducts electricity and is soft and slipper. Explain in terms of structure and bonding, why graphite has these properties. 5. Compare the structure and properties of giant ionic structures including
1. Explain why a metal conducts electricity when solid or molten but an ionic compound conducts only when molten and not when solid. 2. Explain why the melting point increases from top to bottom going down group 7 (the halogens). 3. a) Which type of
Solid conducts electricity. Atoms are joined in a giant structure.  (b) Graphite is used in pencils. Use ideas from the structures to explain why graphite can make marks on paper. Tick ( ) two boxes next to the best explanations. All the bonds in graphite are
Graphite is a good conductor of heat and electricity. 4. Although graphite is a very stable allotrope of carbon but at a very high temperature it can be transformed into artificial diamond. ADVERTISEMENTS: 5. Chemically, graphite is slightly more reactive than 1.
In graphene, electrons can move faster than in any other material at room temperature. But techniques that cut sheets of graphene into the narrow ribbons needed to form wires of a nano-scale
Once this is done I give them a 6 mark question: explain why graphite conducts electricity but diamond does not, which they self assess. Very pacey lesson with excellent outcomes. Read more
(ii)€€€€€why graphene conducts electricity. (2) (b) €€€€Suggest why a sheet of graphite which has a large nuer of carbon layers would not be
Explain why graphite conducts electricity Has delocalised electrons between the layers that can move through the graphite Explain why graphite can act as a lubricant Weak forces between layers which are free to slide over each other
2/5/2019· (ii) Explain, as fully as you can, why diamond has this property. Use your knowledge of the structure and bonding of diamond and the information shown opposite to help you to answer this question. (3) (c) Explain why graphite is a good conductor of
15/9/2011· Carbon - the most important reason is that graphite conducts electricity! As for LiCl, it will conduct as it cools down to the freezing (melting) point. If it conducts after that, it is because lithium metal is now short-circuiting the electrodes.
Sample question: Explain, in terms of its structure, why graphite can act as lubricant (2 marks) Ans: In graphite when force is applied, the layers can slide over each other. Why graphite conducts electricity?
23/4/2009· For a substance to conduct electricity, it must contain freely moving charged particles - either electrons or ions - that can carry the charge of the electric current through the substance. In both graphite and metal there are ''delocalised'' electrons that are not firmly bound to any particular atom and are free to move about within the substance, carrying the current
(c) Explain, as fully as you can, why a water molecule contains two hydrogen atoms but a hydrogen chloride molecule contains only one. (You may use a diagram in your answer if you wish).
(d) Explain how the student could improve the accuracy of the volume of gas recorded at each temperature. (3) (e) The student then used the same apparatus to measure the volume of gas produced every 10 seconds at 40 °C.
Why do Metals conduct electricity? March 3, 2011, Hari M, Leave a comment Why do Metals conduct electricity? Metals are considered as good conductors of electricity. In terms of chemistry, a metal is a chemical substance that can generate positive ions in
Graphene Graphite 33. (b) Graphite is a non-metal. Use the information to explain why graphite conducts electricity. idea that • in graphite, only three bonds are formed by each carbon atom for 1 mark • one outer electron (per atom), free to move for 1 mark • an
The graphite in them will conduct electricity, but won’t dissolve into the water. Cut a piece of the cardboard to fit over the beaker, then punch two holes in the center of the cardboard about an inch apart. Push the pencils through the holes and set them in the
This permits graphite to conduct electricity and heat as well as absorb light and, unlike diamond, appear black in color. Answer originally posted May 20, 2002. Rights & Permissions
the diagrams to help you explain why graphite can rub off the pencil onto the paper. Carbon can be made into nano-thin, strong sheets called graphene. A graphene sheet is a single layer of graphite. Graphene conducts electricity and is used in
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1 S.4 CHEMISTRY HOLIDAY WORK, JAN-2016 ( READ, RESEARCH AND REMEER) 1. (a) (i) Draw a labeled diagram of the set-up of the apparatus that can be used to prepare a dry sample of carbon dioxide in the laboratory. (ii) Write an equation that
Explain why iodine has a low melting point. Explain, in terms of particles, why liquid iodine does not conduct electricity. END OF QUESTIONS Do not write outside the box [2 marks] [3 marks] [2 marks] as G/Jun15/CH2HP 5 16 Graphite and diamond areDo not