Question

The differentiating electron in an atom has following set of quantum numbers are given below, then answer the given questions.

n

1

2

3

0

0

+

a) Which orbital this electron belongs ?

b) Write the name of the element.

Answer 1

Answer:

Contents:

Quantum Numbers and Atomic Orbitals

1. Principal Quantum Number (n)

2. Angular Momentum (Secondary, Azimunthal) Quantum Number (l)

3. Magnetic Quantum Number (ml)

4. Spin Quantum Number (ms)

Table of Allowed Quantum Numbers

Writing Electron Configurations

Properties of Monatomic Ions

References

Answer 2

Answer:

a) Orbitals are 3s, 3p,  for n= 3. b) Silicon is the element.

Explanation:

Principal quantum number:

• The principal quantum number (symbolised n) is one of four quantum numbers allocated to each electron in an atom to characterise the state of that electron in quantum mechanics.
• It is a discrete variable since its values are natural integers (from 1).

Silicon:

• Silicon is the 14th element in the Periodic Table.
• The first shell has two electrons, the second shell has eight electrons, and the third shell has four electrons.
• Silicon has four valence electrons because the electrons in the third shell are the outermost electrons.

• Silicon's valence electrons are in shell 3. It's electron configuration is 3s2, 3p2. So principal quantum number is 3.