you take the Atomic Mass of an atom say, 16 for oxygen, and subtract the atomic number, 8 for oxygen. 16-8= 8. so there are eight neutrons in the typical oxygen atom.
The sum of protons and neutrons is the atomic mass.
The order of the periodic table is made according to the atomic weights of the elements. The number of protons and neutrons in the nucleus make the atomic weight. Protons make the elements in order of the periodic table.
If your talking about the atomic mass number it is because the amount of neutrons can very. If you are talking about the actual amount of total elements on the periodic table it is because we keep discovering new things.
After taking out my periodic table of elements, the closest i could find would be Californium, with 153 neutrons, Berkelium, with 152 neutrons, and finally Curium with 151 neutrons. This can be found by taking the atomic number of an element (which is the number of protons it has) and subtracting it from the elements atomic mass (which is the number of protons and neutrons added together). No element has a perfect 150 neutron number, but in its most stable isotope form Curium appears to be the closest.
by their atomic number in the periodic table by grouping the elements on the periodic table
The sum of protons and neutrons is the atomic mass.
atomic number
Neutrons are sub-atomic particles. The Periodic Table is an arrangement of the elements (atoms) made from these subatomic particles. Thus Neutrons by themselves have no place in the Periodic Table. However as all elements/atoms (except Hydrogen) contain some Neutrons, it is possible to find out how many using the information presented on the Periodic Table. The number of Neutrons present in an element/atom can be determined by subtracting the atomic number of an element/atom from its atomic mass.
Neutrons are not given directly on the periodic table. However the number of neutrons can be indirectly calculated. Mass number = Number of protons + number of neutrons
Because it is elemental. That is: it is not an alloy. It has a unique number of protons and neutrons.
The order of the periodic table is made according to the atomic weights of the elements. The number of protons and neutrons in the nucleus make the atomic weight. Protons make the elements in order of the periodic table.
If your talking about the atomic mass number it is because the amount of neutrons can very. If you are talking about the actual amount of total elements on the periodic table it is because we keep discovering new things.
This is based on elements. You can use a periodic table. Mass number is equals to total of neutrons and protons.
The mass number is the number of protons plus the number of neutrons in the atomic nucleus.
No. Atoms differ in number of protons, neutrons and electrons.
The Periodic Table of the Elements includes most of this information (but not the number of neutrons). The Chart of the Nuclides (or Table of the Isotopes) includes all of the information.
No one give number to elements in periodic table. they have been calculated