Shorthand Electronic Configuration for Curium (Cm, Z=96)

Published on March 8, 2026

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Determine the noble gas (shorthand) electronic configuration for Curium (Atomic Number 96) using the Aufbau principle by filling orbitals sequentially after the preceding noble gas, Radon [Rn].

Question

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Answer

This is a chemistry problem that asks for the shorthand electronic configuration of Curium (

), which has an atomic number (

) of 96, using the Aufbau principle.

The process to find the shorthand (noble gas) electronic configuration is as follows:

Step 1: Identify the noble gas preceding Curium.

The atomic number of Curium (

) is

. We look at the periodic table to find the noble gas with an atomic number less than 96.

The noble gases and their atomic numbers are:

: 2
: 10
: 18
: 36
: 54
: 86
: 118

The noble gas immediately preceding

(96) is Radon (

), with

Step 2: Determine the remaining number of electrons.

The number of remaining electrons to be filled after the

core is:

Step 3: Determine the electron filling order following Radon ().

The general filling order (Aufbau Principle) following Radon (which completes the

through

shells) starts with the

orbital, followed by the

, and then

orbitals, according to the energy level diagram:

For

(

), the configuration is

. We need to place the remaining 10 electrons.

orbital: Fills first, maximum 2 electrons.

Remaining electrons: .
orbital: Fills next, maximum 14 electrons. We have 8 electrons left.

Remaining electrons: .

Step 4: Write the shorthand electronic configuration.

The shorthand electronic configuration for

(

) is:

(Note: While the

orbitals are often written before the

orbitals when following the strict Aufbau filling sequence after

, the standard convention for the actinides often lists the

electrons followed by the

electrons if they are present, or groups the

orbitals together. For

, which is in the actinide series, the configuration is typically written with the

electrons immediately following

The final answer using standard formatting is:

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Shorthand Electronic Configuration for Curium (Cm, Z=96)

Question

Answer

Step 1: Identify the noble gas preceding Curium.

Step 2: Determine the remaining number of electrons.

Step 3: Determine the electron filling order following Radon ().

Step 4: Write the shorthand electronic configuration.

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Shorthand Electronic Configuration for Curium (Cm, Z=96)

Question

Answer

Step 1: Identify the noble gas preceding Curium.

Step 2: Determine the remaining number of electrons.

Step 3: Determine the electron filling order following Radon ( ).

Step 4: Write the shorthand electronic configuration.

Related math solutions

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Step 3: Determine the electron filling order following Radon ().