the Atomic Mass and atomic number (number of protons)
the number of neutrons is the mass minus the number
Elements are made of one type of atom. Atoms are made of electrons, neutrons and protons
No they are made up of Protons, Neutrons and Electrons.
It tells the amount of protons neutrons and electrons are in an atom.
Technetium has protons, neutrons and electrons. It also happens to be radioactive. For more information on it go here: http://en.wikipedia.org/wiki/Technetium
Because it has the atoms in the protons and neutrons
No. Atoms differ in number of protons, neutrons and electrons.
No, Mendeleev did not know about protons, neutrons, and electrons. He is best known for creating the periodic table of elements based on the properties of the elements without knowledge of the atomic structure. The discovery of protons, neutrons, and electrons came later with the development of atomic theory.
No. It is not the same. the number of valence electrons are same for the elements in the same column (group).
Because the masses of protons, neutrons and electrons are not whole numbers.
Chlorine itself is an element. It is on the Periodic Table (of the Elements). It is made from protons, electrons and neutrons.
No, they are organized by numerous factors (such as free electrons and number of orbital shells) but are given their periodic number based on their electrons.No. They are arranged by the number of protons which is the same as the number of electrons.
Look on a periodic table of the elements. If you can't figure it out from there, you don't really need to know.