The periodicity of nonmetals is that reactivity increases from left to right across a period, through group 17, the halogens. As you move down a group, reactivity decreases. Fluorine is the most reactive element.
The periodic table tells you chemical elements. :)
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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.
Data from the periodic table for rhodium: the chemical symbol is Rh, it is a transition metal, it is a solid, it is a platinum metal, Rh has a low chemical reactivity, the atomic number is 45, Rh has 45 protons an 45 electrons, it is in the period 5, it is in the group 9, rhodium has high melting and boiling temperatures.
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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.
Electronegativity increases while moving left to right along the period and decreases down the group in the periodic table.