Why would you expect sodium (Na) to react strongly with chlorine (Cl)?
2 answers:
Answer: The correct option is (3) " Sodium needs to lose one electron, and chlorine needs to gain one electron ".
Explanation :
The electronic configuration of sodium (Na) is . It has only one vacant electron.
While the electronic configuration of chlorine is . It has seven valance electrons.
When Na reacts with Cl, Na will lose one electron and this lost electron gets transferred to chlorine. This forms a strong ionic bond.
So, the correct option is (3) " Sodium needs to lose one electron, and chlorine needs to gain one electron ".
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The electric field produced by a single-point charge is given by
where
k is the Coulomb's constant
q is the charge
r is the distance from the charge
To find the electric field at x=0.200 m, we need to find the electric field produced by each charge at that point, and then find their resultant.
1) The first charge is , and it is located at x=0, so its distance from the point x=0.200 m is
Therefore, the electric field is
And since the charge is negative, the direction of the field is toward the charge, so toward negative x direction.
2) The second charge is and it is located at x=0.800 m, so its distance from the point is
Therefore, the electric field is
And since the charge is negative, the direction of the field is toward the charge, so toward positive x-direction.
3) The total electric field at x=0.200 m will be given by the difference between the two fields (because they are in opposite directions). Taking the x-positive direction as positive direction, we have
and the sign tells us that the field is directed toward negative x-direction.