In geology, it would be an epoch, but in other areas, it would completely depend on what periods of time you are referring to.
epoch
after Jurrasic period it is the Cretaceous period
The last period of the Cenozoic era is the Neogene period, which was preceded by the Paleogene period.
3rd period
The Permian period is the last period of the Paleozoic era
Sulfur is in the 3rd period.
subcategory
is 422.0 a category, subcategory, or subclassification?
No, not yet. But when there are enough questions on the topic, a subcategory might certainly be opened.
is code 986 a category, subcategory, or subclassification
is code 986 a category, subcategory, or subclassification
No, there is no limit to the amount of questions per category or subcategory.
There is a subcategory for Super Smash Bros at this link:http://wiki.answers.com/Q/FAQ/3437
The subcategory called "English to Latin" can be found here:http://wiki.answers.com/Q/FAQ/4109
Yes, there is. Here is the link to the subcategory called Break Dancing:http://wiki.answers.com/Q/FAQ/8158
A subcategory; category
You cannot create a new subcategory yourself.(See the Related question for information about requesting a new category.)
The category called "Cleaning" is a subcategory of Home and Garden, whereas the subcategory of "Cleansing" is a subcategory of Alternative Medicine. The former category deals with questions about cleaning in your home; the latter pertains to the state of health of your body.