Which of following metalloids is located in the sixth period of periodic table

The metalloid that is Located in the sixth period of periodic table is : 
Astatine
It's usually found on the earth crust, usually because of the decay products of various heavier elements

hope this helps

Flyxu7jkopvf7

Answerd. may include all of these are many definitions of bases: the  brønsted-lowry definition of acids and bases says that bases are proton acceptors.the arrhenius definition of acids and bases says that bases increase [oh⁻] in solution (thereby producing oh⁻ ions)the lewis definition of acids and bases says that bases donate electron pairs.therefore, the sensible answer is that a base may include all of the described characteristics.