I think that the ionic radii decrease
Moseley's law
isobars are elements with same mass numbers (Atomic Mass) and different atomic number (number of proton or electron)
Elements with atomic numbers 89-94: natural elements.Elements with atomic numbers 95-98: artificial elements but they are also discoverd in nature as ultratraces.Elements with atomic numbers 99-103: artificial elements.
Mendeleev
the atomic number is equal to the number of electrons(-) and protons(+): that is why elements have no charge, as a neutron is neural
The elements with atomic numbers between 57 and 71 are called lanthanoids (or lanthanides).
Every elements has atomic number, elements identity determined the number of protons in its nucleus.
Elements are arranged in a periodic table by atomic number, lower on top and left. Atomic masses have no direct relationship to the arrangement of atoms, although generally atoms with higher atomic numbers will have higher atomic masses. (There are at least three exceptions for atoms with atomic numbers differing by 1.)
The mole is the atomic weight expressed in grams.
All chemical elements have atomic numbers.
Below uranium in the periodic table are all the elements with atomic numbers between 1 and 91.The atomic number of uranium is 92.
Moseley's law
isobars are elements with same mass numbers (Atomic Mass) and different atomic number (number of proton or electron)
Elements with atomic numbers 89-94: natural elements.Elements with atomic numbers 95-98: artificial elements but they are also discoverd in nature as ultratraces.Elements with atomic numbers 99-103: artificial elements.
Mendeleev
Electron configuration is the arrangement of elements according to their increasing atomic numbers whiles period is the arrangement of elements according to the increasing number of valence electrons.
The periodic law is:When elements on the periodic table are arranged by atomic number, relationships and similarities in properties can be seen.This means that the properties of the elements are periodic, or recurring, functions of their atomic numbers. Because of this phenomenon, it is possible to construct a table that graphically reflects the relationship between the properties and atomic number. This table is called the Periodic Table.