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They use a mass spectrometer.

The atomic number equals the number of protons in the nucleus of the atom. It required a bit of work to figure out originally (the mole number and Avogardo played a big part).

The trouble with the mass spectrometer is that it works with compounds as well as elements ... it was a late development.

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14y ago
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15y ago

Atomic numbers are assigned by the number of protons in an atomic nucleus.

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14y ago

The atomic number is determined by the number of protons in the nucleus of an atom. The atomic number is also equal to the number of electrons in a neutrally charged atom.

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13y ago

The atomic number is the number of protons in an atoms nucleus,simply count how many protons are located in the nucleus

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14y ago

Atomic numbers are not "assigned." The atomic number is the number of protons in the nucleus of the element. This is the same as the number of electrons in a neutral atom of the element.

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12y ago

It is on the Periodic Table

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Q: How do you determine the atomic number?
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Related questions

Which particle determines the atomic number of an element?

The atomic number of an element is determined by the number of protons.


What does the number of neutrons determine?

they determine the atomic mass of the atom


How you can determine the number of protons electrons and neutrons an atom has from an atom's mass number and its atomic number?

To determine the number of protons, look at the atomic number. The number of electrons is also the atomic number.To find the number of neutrons subtract the atomic number from the Atomic Mass number.


How do scients determine the atomic number of an atom?

the atomic number is determined by the number of protons in a nucleus.


How can you determine the number of electrons in a atom?

The atomic number


What determine the atomic number of atom?

The number of protons


What do we do to determine the number of neutrons in a atom?

atomic number


What 2 subatomic particles can you determine from the atomic number?

Atomic number is same as the number of protons and number of electrons.


By knowing the atomic number how can we determine the charge of the nucleus?

All atomic nuclei are electrically positive.The number of protons is equal to the atomic number.


The number of these will determine it's atomic number?

The atomic number of any atom is determined by the number of protons in the nucleus of the atom.


Is the atomic number determine by the number protons in an atom?

yes...


How do you determine the number of proton?

The atomic # is the same as the number of protons