14. Carbon and its Compounds
1. Carbon has four electrons in the ___________.
2. Atomic number of carbon is _______.
3. Electronic configuration of carbon (ground state) 6C is _________.
4. Each carbon atom has four unpaired electrons when excited and tends to form four ____________.
5. The bond angle in methane (CH4) is _________.
6. The concept of hybridization was introduced by _________.
7. The redistribution of orbital’s of almost equal energy in individual atoms to give equal number of new orbitals with identical properties like energy and shape is called “______________”.
8. In the hybridization the newly formed orbital’s are called as ‘__________.’
9. The three sp2 orbital’s having one electron each get separated around the nucleus of carbon atoms at an angle of ________.
10. S-orbital’s overlap with another S-orbital in end-on-end overlap to form _____________.
11. P-Orbital’s overlap with another P-Orbital in sideways to form ____________.
12. The property of an element to exist in two or more physical forms having more or less similar chemical properties but different physical properties is called _______________.
13. The different forms of the element are called __________.
14. The occurrence of same element in two or more different forms is known as ___________.
15. Carbon in solid phase can exist in three crystalline allotropic forms: diamond, graphite and _____________.
16. In diamond each carbon atom undergoes in its excited state ________________.
17. In a diamond carbon atoms are in ________________.
18. Due to the hardness of the diamond, it is used as _______________.
19. The density of a diamond is _________.
20. The refractive index of a diamond is ________.
21. Diamond is a bad conductor of ____________.
22. Bond length in a diamond is ________.
23. The bond angle in a diamond is _____________.
24. ____________ forms a two dimensional layer structure with C-C bonds within the layers.
25. In the layer structure ofgraphite, the carbon atoms are in a ___________ environment.
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