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.
Atomic numbers are assigned by the number of protons in an atomic nucleus.
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.
The atomic number is the number of protons in an atoms nucleus,simply count how many protons are located in the nucleus
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.
they determine the atomic mass of the atom
The atomic number
He determined the number of protons of the elements, which is called the atomic number.
The number of protons is equal to atomic number and the number of electrons (for a neutral atom).
Find out the mass number (A) of the specific isotope of the element. Find out the atomic number (Z) of the element (e.g. from the periodic table). Number of Neutrons, N = A-Z.
The atomic number of an element is determined by the number of protons.
they determine the atomic mass of the atom
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.
the atomic number is determined by the number of protons in a nucleus.
The atomic number
The number of protons
atomic number
Atomic number is same as the number of protons and number of electrons.
All atomic nuclei are electrically positive.The number of protons is equal to the atomic number.
The atomic number of any atom is determined by the number of protons in the nucleus of the atom.
yes...
The atomic # is the same as the number of protons