Electronegativity increases while moving left to right along the period and decreases down the group in the Periodic Table.
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The periodic table tells you chemical elements. :)
The rows (periods) work out to be the energy levels, ex. if an element is in period 5, it has 5 energy levels.
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The groups in the periodic table tell you what each element within them will react with, the number of valance electrons the element has, and what family it is in.
the benefit is that you can tell the atomic number atomic mass its symbol and where it is on the periodic table
where tell me then
The Periodic Table tells you how many protons are in an atom by their Elemental Number. In other words, yes, the Periodic Table tells you how many protons are in an atom.
The periodic table tells you all the known elements know to us. I dont think there is such a thing as periods.
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Atomic weight
You can tell it is an element as it is on the periodic table, as Fe, in the transition metals block.