It's the same as the Atomic number, which is the number on an element that usually has no decimal, and is the first number listed. Same goes for electrons.
a modern periodic table should have the 118 elements, their atomic numbers, and their masses. to find the number of protons and electrons, they are the same as the atomic number. to find the neutrons, subtract the protons from the mass.
Look it up in "periodic table of elements" You can find the number of a particular element by looking at the Periodic Table; you can also do this by counting the number of protons in the nucleus.
# protons = atomic number.
The atomic number is equivalent to the number of protons in the nucleus. See the Periodic Table of elements at the link below.
The periodic table of elements
You can find out what groups certain elements are in, and find there relative atomic masses. You can also find outy how reacticve they aRE AND HOW MANY ELECTRONS NEUTRONS AND PROTONS ARE IN CERTAIN ELEMENTS
On a periodic table.
The atomic number of an element is the number of protons in the nucleus of its atom. It is typically found on the periodic table of elements, where elements are arranged in order of increasing atomic number. Each element has a unique atomic number that distinguishes it from other elements.
You use a Periodic Table to find the group, period, and the material of the 115 elements. You can find the the number of protons/electrons on the bottom of the symbols(which is arranged in oder). You can the mass number on the VERY bottom of the element's block. You can find out the number of neutrons by subtracting the number of protons/electrons from the mass number.
The mass number is the number of protons plus the number of neutrons in the atomic nucleus.
The initial development of the Periodic Table was attriibuted to Russian scientist, Dmitri Mendeleev.The first Periodic Table was published by Mendeleev in1869 and comprised 63 elements, arranged by their atomic masses and according to the increasing number of protons in their nucleus.
An elements atomic number gives us its number of protons. Referencing the periodic table, we find the element with atomic number 69 is thulium. Thus, thulium has 69 protons.