Please tell me why and how do chemist use the periodic table? Please describe how it describes the following? Groups, Periods, valence electrons, highly reactive, non reactive, size and
mass of atom.

(I need answer ASAP please)

Drive down any three characteristic of modern periodic table

What is the relation between concentration of reactants and the rate of chemical reaction?

The yearly amounts of carbon emissions from cars in belgium are normally distributed with a mean of 13.9 gigagrams per year and a standard deviation of 5.8 gigagrams per year. find the probability that the amount of carbon emissions from cars in belgium for a randomly selected year are between 11.5 gigagrams and 14.0 gigagrams per year. a. 0.340 b. 0.660 c. 0.167 d. 0.397