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The directivity of a small loop antenna is higher than that of a short dipole because the loop antenna is more directional and concentrates radiation in one direction. The ratio can vary depending on the dimensions and configuration of each antenna, but in general, the loop antenna can have a directivity several dB higher than the dipole.
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Are dipole-dipole forces short-range or long-range?
Dipole-dipole forces are considered to be short-range forces. They occur between molecules that possess permanent dipoles due to differences in electronegativity, and they typically act over small distances.
Which molecule has polar bond but its overall dipole momen is zero?
Symmetric molecules have no dipole moment. An example is carbon tetrachloride, CCl4 , which has no dipole moment yet the C-Cl bonds are polar, (chlorine is more electronegative than carbon). The chlorine atoms each have a small negative charge but because the molecule is tetrahedral there is no dipole and therefore no dipole moment
What is the water cycle in a short term?
the water vapor takes a short time
Why can dipole moment be determined only for neutral system of charges not for charged one?
Dipole moment is calculated for a system with equal and opposite charges because this results in a net dipole moment, which is a measure of the separation of charge within the system. For a charged system, there is no overall separation of charge, so there would not be a net dipole moment to measure.
How do van der Wals forces hold molecules together?
When molecules are close together, a slight attraction can develop between the oppositely charged regions of nearby molecules. Apex------They form temporary, weak dipole attractions between molecules.
Are dipole-dipole forces short-range or long-range?
Dipole-dipole forces are considered to be short-range forces. They occur between molecules that possess permanent dipoles due to differences in electronegativity, and they typically act over small distances.
Why is HCN is a dipole-dipole compound?
HCN is a linear molecule and as nitrogen is the most electronegative atom a small negative charge builds on the nitrogen atom and a small positive charge on the hydrogen. This forms a dipole (dipole means two oppositely charged ends). The intermolecular forces between HCN molecules are electrostatic and are caused by the dipole on one molecule interacting with one on another molecule. This is called dipole -dipole interaction.
Which molecule has polar bond but its overall dipole momen is zero?
Symmetric molecules have no dipole moment. An example is carbon tetrachloride, CCl4 , which has no dipole moment yet the C-Cl bonds are polar, (chlorine is more electronegative than carbon). The chlorine atoms each have a small negative charge but because the molecule is tetrahedral there is no dipole and therefore no dipole moment
Does the SF6 anion have a dipole moment?
The neutral SF6 molecule has no dipole moment. The gas phase SF6- ion is not that well understood- on the basis that the shape is distorted octahedral a small dipole would be expected.
What is the major attractive force in CO?
The major attractive force in CO is the dipole-dipole interaction between the partial positive charge on the carbon atom and the partial negative charge on the oxygen atom. This results in a stronger intermolecular force compared to London dispersion forces, leading to a higher boiling point for CO.
Is NF3 polar nonpolar or ionic?
Nitrogen trifluoride ia a polar compound, with a small dipole moment of 0.234 debye. F has a higher electrnegativity than N , with a 0.94 difference. The lone pair will also cause a small dipole in the opposite direction to the polar bonds. This accounts for the small net dipole moment
Does NF3 have dipole forces?
Yes. It also has London Dispersion Forces (also called van der Waal forces) and Hydrogen bonding between molecules. Due to its shape, trigonal pyramidal it has a slight negative charge on the N and slightly positive charge on the H thus the strongest inter-molecular forces would be hydrogen bonding between the molecules, a type of dipole-dipole interaction. As it is a small molecule the dispersion forces would be very small.
Is N2 have a dipole moment?
Yes, nitrogen gas (N2) does not have a dipole moment because it is a linear molecule with equal and opposite nitrogen atoms, resulting in a symmetrical distribution of charge. This symmetry cancels out any potential dipole moment in the molecule.
Does small have a short or long vowel sound?
The word 'small' has a short 'a' vowel.
Do you want the gross expense ratio to be small or large when investing?
i will definitely need it to be as small as possible since it will determine actual amount of net expenses i must pay.also in the short term i might not have enough cash for such expenses
What molecule possesses a net dipole moment?
Typically one where bond dipoles do not cancel due to the molecular symmetry. The lone pairs also give rise to a small dipole moment and these may cancel out small bond dipoles it depends on the relative directions of the dipole moments.
What is the relationship between a polarity and hydrogen bond?
Polar molecules have a dipole moment and they have intermolecular forces that include dipole-dipole interaction. A hydrogen bond is the attraction between a hydrogen bonded to N, O, F atom with N, O, F lone pair. Small molecules that exhibit this effect are HF, H2O and NH3. The example molecules are all polar. The hydrogen bond interaction is stronger than a normal dipole-dipole interaction.
