Question

what is the valence of iodine?

what is the valence of tin?

what is the valence of gallium?

Answer 1

Answer -

what is the valence of iodine?

We know that,

Atomic Number of Iodine is 53.

So,

Electronic Configuration of Iodine is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁵

So,

Number of electrons in outer shell i.e. 5 th shell are 7 (i.e. 2 in s and 5 in p)

So,

Valence Electrons in Iodine = 7 [ANSWER]

what is the valence of tin?

We know that,

Atomic Number of Tin is 50.

So,

Electronic Configuration of Tin is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p²

So,

Number of electrons in outer shell i.e. 5 th shell are 4 (i.e. 2 in s and 2 in p)

So,

Valence Electrons in Tin = 4 [ANSWER]

what is the valence of gallium?

We know that,

Atomic Number of Gallium is 31.

So,

Electronic Configuration of Gallium is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p¹

So,

Number of electrons in outer shell i.e. 4 th shell are 3 (i.e. 2 in s and 1 in p)

So,

Valence Electrons in Gallium = 3 [ANSWER]