The element x in group 17 has 3 shells write the complete sub shell electronic configuration

2:8:7

Explanation:

The first shell can accommodate a maximum of 2 electrons, while the second level accommodates a maximum of 8 while the third last cell takes up the remaining 7 electrons

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.