Question

Write the electron configurations for the following atoms or ions: (a) B3+ (b) O– (c) Cl3+

Write the electron configurations for the following atoms or ions:

(a) B3+

(b) O–

(c) Cl3+

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Homework Answers

Answer #1

Boron atom atomic number is 5. Electronic configuration of Boron is 1S22S22P1.

B3+ is formed by the removal of three outer shell electrons from the boron atom (B). Hence the electronic configuration of B3+ is 1S2.

Oxygen atom atomic number is 8. Electronic configuration of Boron is 1S22S22P4.

O- is formed by the addition of one electron to the outer shell of the Oxygen atom (O). Hence the electronic configuration of O- ​ is 1S22S22P4.

Chlorine atom atomic number is 17. Electronic configuration of Boron is 1S22S22P63S23P5.

Cl3+ is formed by the removal of three outer shell electrons from the Chlorine atom (Cl). Hence the electronic configuration of Cl3+ is 1S22S22P63S23P2.

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