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The smallest atom is helium (nucleus and electrons) while francium is the largest.

Helium: 28 picometer

francium: 260 picometer

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Q: What is an appropriate range for the diameter of an atom?
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Diameter of the center of the atom of hydrogen?

The atomic nucleus of hydrogen atom has a diameter of 1,75 femtometres.


Can you explain why the estimation of the diameter of an atom is greater or less than the known value?

Here's a guess... Without getting overly complicated.... The diameter of the atom isn't just the diameter of the atom's nucleus... it is the diameter of the whole atom including the electron cloud surrounding the nucleus. As the name implies, an electron cloud represents all the possible locations that the electron could be. This cloud has thickness and therefore the atom could be smaller if the electron is in a portion of the cloud closer to the nucleus or larger is the electron is in a portion of the cloud farther from the nucleus. The "known value" is probably just the average of the two. Therefore, an atom's diameter has a range rather than a fixed value.


Is atomic mass and atomic diameter the same thing?

No, the atomic mass is the average mass of the atom and the atomic diameter is the average diameter of the atom


What is the atom with the smallest diameter?

A hydrogen atom has the smallest diameter because there is only one proton and neutron.


How much bigger is a hydrogen atom than a proton?

A hydrogen atom has a diameter of about 60 picometers while a proton has a diameter of 1.75 femotometers. So a hydrogen atom's diameter is about 35,000 times that of a proton.


Which diagram best represents the relationship between the diameter of a sodium atom and the diameter of a positive sodium ion?

A sodium ion is smaller in diameter than a sodium atom.


How does the diameter of the nucleus compare to the diameter of the atom?

what kind of atom there not all the same(1.75×10−15 m)this is the diameter of a hydrogen nucleus


What is the ratio of the diameter of a hydrogen atom to the diameter of a proton?

That ratio is about 53,000.


The diameter of an atom is 5 angstroms express this diameter in centimeters?

5e-8cm


What is the diameter of a xenon atom?

432 picometres.


How much larger is the diameter of the entire atom compared to the diameter of its nucleus?

100,000 times.


How many meters is an atom meter?

The nucleus of the atom has a diameter of about meter, whereas the atomic diameter is about meter. This means that the nucleus has a diameter 10,000 times smaller than the atom. The nucleus of the atom has a diameter of about meter, whereas the atomic diameter is about meter. This means that the nucleus has a diameter 10,000 times smaller than the atom.