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Do Diodes have the ability to block electron flow in one direction and pass electrons in the opposite direction.?
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∙ 6y ago
yes
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∙ 6y ago
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What element has greatest electrode negativity?
Electronegativity: is the ability of an atom to attract the bonding electrons in a covalent bond fluorine is the most electronegative element on the periodic table, and francium is the least, the reasons for this are fairly simple: The factor which affect electro negativity are similar to that of ionisation energy, if you are not familiar with this then here they are - nuclear charge; the greater the charge of the nucleus the more strongly the electrons are held towards the nucleus, thus increasing elecrtonegativity - shielding by inner electrons; the greater the number of shells between the outer electron shell and nucleus the less positive attraction will be 'felt' by the outer electron, as a result the elecrtonegativity decreases - and distance between nucleus and outer electron shell; attraction falls greatly as distance increases between outer electron shell and nucleus as a result as distance increase the elecrtonegativity of the element decreases. As fluorine has a small atoms the closer the nucleus is to the shared outer shell of electrons, so the more its will attract the bonding electrons in a covalent bond. Francium is the least as it has the most shells of the group 1 elements along with the greatest number of electrons, as a result both distance and shielding have been increase causing eleconegativity to decrease significantly.
How fast an electric current flow in a circuit?
the ability if a substance to slow down electric current
How would the shape of an electron shell affect the ability of the material to conduct electricity?
Basically, the Electron shells in an insulator are complete, they are not prone to accepting external electrons or donating any of theirs. As such they aren't waystations for electrons looking to move (conduct). There is a need to slip away from what's going on with individual atoms when looking at conductivity (which can be used to sort out insulators from conductors). When a whole bunch of atoms or molecules are put together, a number of other opportunities or places for electrons to exist are created. The valence band of a given atom is subordinated and another type of "valence band" is set up. This new valence band (we are assigning a new definition) does not have a given energy level (like it would for a given atom) but, rather, has a range of allowable energy levels. This is because the many different atoms and molecules when combined to make up whatever it is we are making provide other places (energy levels) in which electrons can hang out. (Let's give Fermi, Schrödinger, Bloch and Brillouin the day off to keep from running off the page.) We have our newly defined valence band as a range of energy levels which an electron can occupy. (These were not available in a single atom of the material.) In a conductor, the band of energies in which an electron must be to support current flow actually are so low that they overlap part of the valence band. That means electrons in the material can support conduction and play musical electrons. In an insulator, there is a gap between the valence band (that group of energy levels allowed by the material as a whole) and the conduction band. Electrons cannot support conduction because they cannot reach the higher energy bands necessary to support it.
What is Edwards vampire ability?
His ability only unique to HIM is the ability to read minds. except Bella's of course since she has her own ability even as a human.
What is delayed gratification?
Delayed gratification is when you do something you know you should, even though you don't want to, because you know it will make you feel better later. It is the opposite of instant gratification, where you do whatever makes you feel good right now.
The ability of an atom in a molecule to attract electrons is best quantified by the what?
The electron affinity
How do you read the electrostatic series?
The electrostatic series ranks elements in order of their ability to gain or lose electrons. The list shows which elements have a higher affinity for electrons (indicating electron gain) and which have a lower affinity (indicating electron loss). This ranking can help predict the direction of electron transfer in chemical reactions.
Electron affinity tends to what?
Electron affinity is an elements' ability to attract electrons and is variable for each element. Generally the more electronegative atoms are furthest to the right bottom of the periodic table and ascending to the left the elements lose their electron accepting ability.
What is the ability of light to cause electron movement and electric current?
The photo-electric effect is the ability of light to cause the movement of electrons, which is called an electric current.
What is meant by EA?
electronegativity which the ability of an electron to pull the shared pair electrons more unto it self than the other atom in the bond
How would an electron shell affect the ability of the material to conduct electricity?
Electrical conduction is due to the large number of free electrons present in good conductors like copper, silver, gold, and aluminum, rather than electrons bound to the atoms of the material in electron shells.
What is a chemical property determined by?
by the number of electrons in its outermost shell
Why the elements of group 14 are most electronegative elemenets?
There is no Group 14. The elements of the group 7A are the most electronegative. Basically, electronegativity is the ability to attract electrons. Group 7A elements, or halogens, need just one more electron to reach stability, and are very reactive. So, they can easily accept that electron. In other words, their ability to attract electrons is the highest.
What is the unit of measure for ea?
electronegativity which the ability of an electron to pull the shared pair electrons more unto it self than the other atom in the bond
How does some atom in covalent bonds become slightly negative or slightly positive what type of covalent bonds do these atom form?
Each element has a certain affinity for electrons known as electronegativity. The higher the electronegativity of an element the more affinity it has to pull electrons towards itself. Because many elements do not have similar electronegativity values, their ability to pull electrons to themselves is also dissimilar. ex Ch3F flourine has an electronegativity of about 4.0, the highest on the periodic table and carbon has about 2.4. Because of the difference in values, electron density is pulled towards the fourine atom because it has a greater affinity to pull electrons. The shape of a molecule also has a lot to do with the expected polarity of the bond. Electron pulling is represented by vectors which have both direction and magnitude. If there is a case in that all the vectors are of equal magnitude but of opposite direction such that the force is cancelled out then the overall polarity is practically nonexistent. CF4 is non polar because all four flourines pull electron density towards them with the same magnitude but opposite direction, effectively canceling the polarity. This phenomenom can also be observed on symmetrical alkenes of the trans variety
The ability of atoms to combine with other atoms is determined by?
The number of electrons of both atoms and its valence number.
Is a numerical value that reflects how much an atom in a molecule attracts electron?
Linus Pauling defined electronegativity as "the ability of an atom in a molecule to attract electrons to itself."
