This quesito arrises due to the "periodic" trend in the table
as the name implies, there is a periodic trned in which the chemical elements will repeat their chemical/physical properties
Some exmples:
- They have similar oxidation states, such as thos ein the IA family, they will tend to form +1 ions, and IIV family will try to have -1 charge
- They will have similar Electronegativities, for those metals in IA will be low, for those in IIA group, will be high
- Ionization Energy will be very similar, they will have slightly changes across their periods, but in general they will have similar 1st, second and third ionization energies
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