Plutonium Bohr model

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In the plutonium Bohr model, the nucleus holds 94 protons and 150 neutrons. Encircling this nucleus are seven electron shells, carrying a total of 94 electrons.

To draw the plutonium Bohr model, outline the 94 protons, 150 neutrons, and 94 electrons. Start by illustrating the nucleus, and then draw the seven electron shells. The first six shells should contain 2, 8, 18, 32, 24, and 8 electrons, respectively, while the seventh shell holds the remaining 2 electrons.

Steps

Find protons, neutrons, and electrons of plutonium atom

Plutonium has 94 protons, 150 neutrons, and 94 electrons.

Plutonium protons

• Protons = atomic number

From the periodic table, find the atomic number of plutonium.

The atomic number of plutonium is 94. Hence, plutonium has a total of 94 protons.

Plutonium neutrons

• Neutrons = atomic mass – atomic number

The atomic mass of plutonium is 244 and the atomic number of plutonium is 94.

Subtract the atomic number (94) from the atomic mass (244). Hence, plutonium has a total of 244 – 94 = 150 neutrons.

Plutonium electrons

• Electrons = atomic number

The atomic number of plutonium is 94. Hence, plutonium has a total of 94 electrons.

Draw nucleus of plutonium atom

The nucleus of a plutonium atom contains 94 protons and 150 neutrons. So draw the nucleus of plutonium atom as follows:

Now in the next step, draw the 1^st electron shell and start marking electrons.

Draw 1^st electron shell

Remember that we have a total of 94 electrons.

The 1^st electron shell (containing s subshell) can hold up to a maximum of 2 electrons. So draw the 1^st electron shell as follows:

In the above image, 1 represents the 1^st electron shell that contains 1s subshell. And the green color represents the number of electrons in that subshell. This means that the 1^st electron shell has a total of 2 electrons.

Since we have already used 2 electrons in the 1^st electron shell, now we have 94 – 2 = 92 electrons left. So in the next step, we have to draw the 2^nd electron shell.

Draw 2^nd electron shell

The 2^nd electron shell (containing s subshell and p subshell) can hold up to a maximum of 8 electrons. So draw the 2^nd electron shell as follows:

In the above image, 2 represents the 2^nd electron shell that contains 2s and 2p subshells. And the green and orange color represents the number of electrons in that subshell. This means that the 2^nd electron shell has a total of 8 electrons.

Now we have already used 10 electrons in 1^st and 2^nd electron shells, so we have 94 – 10 = 84 electrons left. So in the next step, we have to draw the 3^rd electron shell.

Draw 3^rd electron shell

The 3^rd electron shell (containing s subshell, p subshell, and d subshell) can hold up to a maximum of 18 electrons. So draw the 3^rd electron shell as follows:

In the above image, 3 represents the 3^rd electron shell that contains 3s, 3p, and 3d subshells. And the green, orange, and pink color represents the number of electrons in that subshell. This means that the 3^rd electron shell has a total of 18 electrons.

Now we have already used 28 electrons in 1^st, 2^nd, and 3^rd electron shells, so we have 94 – 28 = 66 electrons left. So in the next step, we have to draw the 4^th electron shell.

Draw 4^th electron shell

The 4^th electron shell (containing s subshell, p subshell, d subshell, and f subshell) can hold up to a maximum of 32 electrons. So draw the 4^th electron shell as follows:

In the above image, 4 represents the 4^th electron shell that contains 4s, 4p, 4d, and 4f subshells. And the green, orange, pink, and blue color represents the number of electrons in that subshell. This means that the 4^th electron shell has a total of 32 electrons.

Now we have already used 60 electrons in 1^st, 2^nd, 3^rd, and 4^th electron shells, so we have 94 – 60 = 34 electrons left. So in the next step, we have to draw the 5^th electron shell.

Draw 5^th electron shell

The 5^th electron shell can hold up to a maximum of 50 electrons. So draw the 5^th electron shell as follows:

In the above image, 5 represents the 5^th electron shell that contains 5s, 5p, 5d, and 5f subshells. And the green, orange, pink, and blue color represents the number of electrons in that subshell. This means that the 5^th electron shell has a total of 24 electrons.

In the 5^th electron shell, the 5f subshell has only six electrons. This is because according to the aufbau principle, the 6s subshell is filled first and then 4f, 5d, 6p… and so on.

Now we have already used 84 electrons in 1^st, 2^nd, 3^rd, 4^th, and 5^th electron shells, so we have 94 – 84 = 10 electrons left. So in the next step, we have to draw the 5^th electron shell.

Still have a question: Why does the 5f subshell have only six electrons?

Answer: Once the 7s subshell is completely filled, then only we can mark electrons in the 5f subshell. That’s why in the 5^th electron shell, the 5f subshell has only six electrons.

For a detailed explanation, check the orbital diagram of plutonium.

Draw 6^th electron shell

The 6^th electron shell can hold up to a maximum of 72 electrons. So draw the 6^th electron shell as follows:

In the above image, 6 represents the 6^th electron shell that contains 6s and 6p subshells. And the green and orange color represents the number of electrons in that subshell. This means that the 6^th electron shell has a total of 8 electrons.

The 6^th electron shell contains only 6s and 6p subshells, and not 6d and 6f subshells. This is because according to the aufbau principle, the 7s subshell is filled first and then 5f, 6d, 7p… and so on.

Now we have already used 92 electrons in 1^st, 2^nd, 3^rd, 4^th, 5^th, and 6^th electron shells, so we have 94 – 92 = 2 electrons left. So in the next step, we have to draw the 7^th electron shell.

Draw 7^th electron shell

The 7^th electron shell can hold up to a maximum of 98 electrons. So draw the 7^th electron shell as follows:

In the above image, 7 represents the 7^th electron shell that contains 7s subshell. And the green color represents the number of electrons in that subshell. This means that the 7^th electron shell has a total of 2 electrons.

That’s it! This is the final Bohr model of plutonium atom as we have used all 94 electrons: 2 electrons in the 1^st electron shell, 8 electrons in the 2^nd electron shell, 18 electrons in the 3^rd electron shell, 32 electrons in the 4^th electron shell, 24 electrons in the 5^th electron shell, 8 electrons in the 6^th electron shell, and 2 electrons in the 7^th electron shell.

Next: Americium Bohr model

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Related

• Plutonium

More topics

• Plutonium orbital diagram

External links

• File:94 plutonium (Pu) enhanced Bohr model.png – Wikimedia Commons
• Chemical Elements.com – Plutonium (Pu) – Chemical Elements.com
• Plutonium (Pu) – Periodic Table – ChemicalAid
• What is the Bohr model for Plutonium? – Topblogtenz