Dimitri Mendeleev was the first to put elements together on a table. He knew there were elements missing but he noticed a trend in some of the elements known at the time. Sodium, Lithium and other alkali metals all have the same properties so he put them under the same column and created other columns with similar attributes (Halogens, Noble gases, Alkaline earth metals). Over the years, new elements were discovered and put into the rough outline that Mendeleev created.
I hope that is about what you wanted.
"a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction."
a reaction that is caused by chemicals
3 is the answer your looking for
Extensive properties depend on the amount of substance. The volume of a sample is an extensive property: 1000 grams of water takes up more volume than 10 grams of water. Mass is also an extensive property.
In general, the given alcohol above belongs to tertiary, and this is the reason why it doesn't undergo oxidation. Now, if you will try to analyze the given molecular formula, you will end up having seven (7) carbon atoms which make up a chiral carbon. So the answer would be option C. Hope that answer helps.