Atomic weight
The periodic table tells you chemical elements. :)
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The periodic table is in order of atomic mass
The atomic number of each element is on the periodic table. The elements are arranged on the periodic table in order of increasing atomic number.
By number of elctrons,protons in them and their reaction rate
They are in the same column.
Elements in the same period has same number of valence shells.There are 7 periods in Periodic Table.
The elements are lined up in order of increasing atomic number (number of protons).
The periodic table tells you that elements in the same group have similar chemical properties because they have the same number of valence electrons. This influences how they react with other elements and helps predict their behavior in compounds.
Elements with similar properties are found in the same group or column on the periodic table. This is because they have the same number of valence electrons, which influences their chemical behavior. Elements in the same group tend to react in similar ways and have comparable physical properties.
The periodic table shows the atomic number, symbol, mass number, density of an element. Elements are arranged in periodic table such that their physical and chemical properties follows varies in a systematic way.