halide ion?

Question

why is the atomic radius of a halide ion larger than teh radius of its atom?? urgent!!

Answer 1

When you form a halide ion you add an electron to the outter shell of electrons. The addition of an electron causes the shell to get larger for two reasons. First, the ions repel each other, and so the shell enlarges so that the electrons are farther apart. Second, you have the same positive nuclear charge attracting more electrons, so that the average charge/electron is reduced, leading to shell expansion, and thus a larger ion.

Answer 2

Because the halide ion will gain one negative electron,that's why the ion's atomic radius is larger.

Answer 3

To form a hailde ion the halogen gains one electron to attain noble gas configuration. So the number of protons < number of electrons. So the nuclear attraction decreases causing the ionic radius to be larger than the atomic radius.

Answer 4

As the effective charge on a halide ion is more than the charge on its nucleus so the outermost orbital of atom is expanded than its usual radius.So effective radius of ion is greater.

Answer 5

dear know thou.... that all negative ions have larger radius then their atoms... because they have more number of electron then protons..... so orbits are pulled outward

Answer 6

If you add an electron, the electron-electron repuslions are now greater, so the radius goes up.

Answer 7

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