What is located within 10 to 15 km above the earth's surface?

It extends 10 to 15 kilometers (6 to 10 miles) above the earth's surface depending on latitude and time of the year. The troposphere contains most of the atmosphere's water vapor.

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.