Choose the bond that is the weakest:
A) Na-Cl
B) I-I
C) C=N
D) Li-F
E) C=O
I don't understand the question... do they mean polarity wise, IMF wise or bond length wise.
I know the answer is C but why C.
I think they mean bond wise. I would pick C because its the odd ball in the group. We know I-I is a good covalent bond, LiF and NaCl are ionic bonds and C=O is quite polar. I tried drawing a Lewis structure for C=N and it doesn't have an even number of electrons.
thank u sooo much :D
The question is asking you to identify the bond that is the weakest among the options given. In this context, the strength of a bond refers to its bond dissociation energy or bond energy, which is the energy required to break the bond.
Among the options listed, the weakest bond is C=N. The reason is that the C=N bond is a double bond between carbon (C) and nitrogen (N), which is generally weaker than a single bond. Double bonds consist of two pairs of electrons being shared between the two atoms, whereas single bonds consist of only one pair of electrons being shared.
It is important to note that the strength of a bond can vary depending on various factors such as bond length, bond energy, and polarity. However, in this context, the question is specifically asking about the strength of the bond in terms of bond dissociation energy.
To determine which bond is the weakest among the options given, we need to consider the strength of each type of bond. Bonds can be classified as ionic, covalent, or polar covalent based on the electronegativity difference between the bonded atoms.
In general, ionic bonds are the strongest, followed by polar covalent bonds, and then covalent bonds. Ionic bonds are formed between atoms with significantly different electronegativity values, resulting in the complete transfer of electrons from one atom to another. Covalent bonds occur when atoms with similar electronegativity values share electrons to achieve a stable electron configuration. Polar covalent bonds have a partial transfer of electron density between atoms involved in the bond.
Now let's analyze each option:
A) Na-Cl: This is an ionic bond, as sodium (Na) has a low electronegativity, while chlorine (Cl) has a high electronegativity. The Na-Cl bond is strong due to the significant electronegativity difference between sodium and chlorine.
B) I-I: This is a covalent bond, as both iodine (I) atoms have similar electronegativity values. Covalent bonds tend to be weaker than ionic bonds.
C) C=N: This is a covalent bond between a carbon (C) atom and a nitrogen (N) atom. Carbon and nitrogen have similar electronegativity values, forming a relatively weak covalent bond. This bond is weaker than an ionic bond but similar in strength to the I-I covalent bond.
D) Li-F: This is an ionic bond, as lithium (Li) has a low electronegativity, while fluorine (F) has a high electronegativity. The Li-F bond is strong, similar to the Na-Cl bond.
E) C=O: This is a polar covalent bond between a carbon (C) atom and an oxygen (O) atom. Oxygen is more electronegative than carbon, causing an unequal sharing of electrons and making the bond relatively stronger than a typical covalent bond.
Based on the information above, we can conclude that the weakest bond among the options provided is C) C=N.