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What is the most massive atom on the periodic table?

Updated: 8/10/2023
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ChloeRoseSchonig

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11y ago

Best Answer

Atoms size get smaller as you go across from left to the right in periods and gets larger down the group on the periodic table.

For a given group, the largest atom is in period 7. For a given period, the largest atom is in group 1.

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11y ago
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11y ago

Heaviest

The largest (heaviest) NATURAL element is uranium, number 92. (Natural plutonium is extraordinarily rare.)

The largest (heaviest) elements are the synthesized radioactive elements in row 7, atomic numbers 104 to 118. The heaviest atom of a named element is 293Lv (livermorium-293). The heaviest possibly observed are ununpentium-294 and ununoctium-294.

Largest Atomic Radius

The element cesium (caesium, Cs), atomic number 55, has the largest atomic radius in period 6. Only francium(row 7) may be larger, but testing is difficult because francium does not exist in any meaningful amounts (maybe 30 g on the entire Earth).

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7y ago

The largest atom (in terms of volume not Atomic Mass or weight)

lithium or boron

Cesium (Cs), in the lower left hand corner of the table, has the largest known atom

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9y ago

The lower part contains the larger atoms. the atomic size increases down a group. It decreases from left to right of a period.

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11y ago

Francium has the greatest atomic radius.

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11y ago

Francium has the greatest atomic radius.

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11y ago

Lawrencium

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11y ago

cesium

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Q: What is the most massive atom on the periodic table?
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