Chemistry, 26.07.2019 11:00 AdanNava699

The resistance of a wire is not dependent on a) temperature b) length c) diameter d) current

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Answer from: ReaLily

D). Current Hope this will help

Answer from: oliviaciscooc

D) current

Explanation:

Resistance is the opposing force to the motion of the charges which constitute current.

The resistance increases with increase in temperature and length of the wire but decreases with the diameter.

It does not depend on the current.

Resistance is given by:

$R =\frac{\rho l}{A}=\frac{4\rho l}{\pi d^2}$

where, ρ is the resistivity, l is the length of the wire, A is the area of cross-section and d is the diameter.

Other then these factors, the resistance increases with increase in temperature. This is because at higher temperature, the collision between electrons positive kernels increases which restricts the motion of electrons. This increases the resistance.

Answer from: Quest

sodium (na), for example, has one electron in its valence shell. this is an unstable state because that valence shell needs eight electrons to be full. in order to fill its valence shell, find a way to add seven electrons to its valence shell

Answer from: Quest

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is $1s^{2}2s^{2}2p^{6}3s^{1}$ and electronic configuration of phosphorous is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{3}$ .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

$3na + p \rightarrow na_{3}p$

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.

Electrons are transferred from atoms of to atoms of this transfer makes the sodium atoms and the

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The resistance of a wire is not dependent on a) temperature b) length c) diameter d) current...

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