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Thallium

Symbol: Tl

Atomic Number: 81

Atomic Mass: 204.3833 amu

Number of Protons & Electrons: 81

Number of Neutrons: 123

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Related Questions

How many protons and neutrons does thallium-201 have?

Thallium-201 has 81 protons and 120 neutrons. This is determined by the atomic number of thallium (81) indicating the number of protons, and the mass number of thallium-201 (201) indicating the total number of protons and neutrons. Subtraction of the atomic number from the mass number gives the number of neutrons.


Why is 81 the answer to how many protons and neutrons in a thallium atom?

The atomic number of thallium (Tl) is 81, which represents the number of protons in the nucleus. Since thallium is a stable element, the number of protons and neutrons in its nucleus should be equal. Therefore, the number of neutrons in a thallium atom is also 81.


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