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akhl

@akhl

Dazzler

Posted: 15 years ago

#191

All answered. Let me know if any doubt.

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Sonia

@Miggi

Inactive

Posted: 15 years ago

#192

@ akhl : Hey thnxx a lot for ur help! :)

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Sonia

@Miggi

Inactive

Posted: 15 years ago

#193

Umm i am really getting confused in formal charges questions. i would really appreciate if sum1 would help me.

C2S2 I have to calculate the formal charges of both carbons and then tell their electron pair geometry and molecular geometry.

do the same thing with PO2CN formal charge of P and C, NFO (F.M of N) and AtO4- (FM of At)?

thnxx in advance

Edited by Miggi - 15 years ago

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akhl

@akhl

Dazzler

Posted: 15 years ago

#194

Check again. Is it C2S2 or CS2?

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Sonia

@Miggi

Inactive

Posted: 15 years ago

#195

Which of the following clusters of orbitals would form the shape shown here (Part A 1 figure) and would also be possible within the valence shell of an atom?

Check all that apply.

	two p orbitals
	one sp^2 orbital and one p orbital
	four sp^2 orbitals
	four sp^3 orbitals
	one d orbital
	four sp^3d orbitals
	four p orbitals
	two sp orbitals

figure is as follows

Edited by Miggi - 15 years ago

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Sonia

@Miggi

Inactive

Posted: 15 years ago

#196

Which of the following clusters of orbitals would form the shape shown here (Part B 1 figure) and would also be possible within the valence shell of an atom?

Check all that apply.

	one d orbital
	five d orbitals
	five sp^3 orbitals
	five sp^3d orbitals
	five sp^3d^2 orbitals
	two sp orbitals and three sp^2 orbitals
	three sp^2 orbitals and two p orbitals
	three sp^2 orbitals and one p orbital

figure:

Edited by Miggi - 15 years ago

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Sonia

@Miggi

Inactive

Posted: 15 years ago

#197

Which of the following clusters of orbitals would form the shape shown here (Part C 1 figure) and would also be possible within the valence shell of an atom?

Check all that apply.

	three p orbitals
	two sp orbitals and four p orbitals
	three sp orbitals
	two sp orbitals and two p orbitals
	six sp^3d orbitals
	six sp^3d^2 orbitals
	six sp^3 orbitals
	one sp orbital and two p orbitals

figure:

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akhl

@akhl

Dazzler

Posted: 15 years ago

#198

Originally posted by: Miggi
C2S2 I have to calculate the formal charges of both carbons and then tell their electron pair geometry and molecular geometry.

The Lewis structure of C2S2 is

:S=C=C=S:

.. ..

Formal charge on a atom = number of valence electrons in the atom in ground state - number of unbounded electrons in the atom - 1/2 * number of electrons that the atom shares with other atoms

For each C atom in C2S2:-

Number of valence electrons in ground state = 4

Number of lone pairs = 0

Number of electrons shared with other atoms = 8 (it shares 4 electrons with S and 4 with C)

Formal charge = 4 - 0 - 1/2 * 8 = 0

Number of lone pairs on each C = 0

Number of bonding pairs on each C = 2

Therefore electron pair geometry is linear

Molecular geometry is linear

Ans: Formal charge = 0

Electron pair geometry: linear

Molecular geometry: linear