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Questions from Organic Chemistry

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Sena Aysel

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Atoms with the same number of protons but different numbers of neutrons are called __________.


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Questions from Organic Chemistry - Details



42 questions
Which of the following describes a hydride ion?
A negatively charged hydrogen ion containing a pair of electrons
Both sigma (σ) and pi (π) bonds can be formed by overlapping p orbitals. Describe the difference.
Sigma bonds are formed from the overlap of atomic orbitals along a circular axis of symmetrical nature, i.e., head-on overlap. All single bonds are sigma bonds. Pi bonds are formed from the overlap of atomic orbitals along a non-symmetrical (parallel) axis, i.e., side-to-side overlap. Double and triple bonds are pi bonds.
What orbitals are used to form the covalent bonds in butane (CH3CH2CH2CH3)?
The carbon-carbon σ bonds are formed by the overlap of two carbon sp3 hybrid atomic orbitals. The carbon-hydrogen σ bonds are formed by the overlap of a carbon sp3 hybrid atomic orbital and a hydrogen s orbital.
Explain why the water molecule has a bent shape and a bond angle less than 109.5°.
The electron replusion between the two lone pairs of electrons on the oxygen of water causes the O-H bonds to squeeze close together.
Why is the C H bond in ethene (H2CCH2) shorter and stronger than the C H bond in ethane(H3C-CH3)?
The length and strength of a C H bond depends on the hybridization of the carbon atom. The more s character in the hybrid orbital used by carbon to form the bond, the shorter and stronger the bond. This is because an s orbital is closer to the nucleus than is a p orbital. Ethene uses carbon sp2 hybridized orbitals (1/3 s character) to make its carbon-hydrogen bonds while ethane uses carbon sp3 (1/4 s character) orbitals.