are a group of elements that zig-zag on the periodic table and separate the metals from ten nonmetals

Which of the following was discovered in the piedmont region of north carolina in 1799?

New communication technologies, improved transportation, and advanced military weapons made it possible for countries to speed up acquiring territory. rule large amounts of territory. fight off competition from opposing nations. expand their economies, which aided in conguest.

The pka of three different c―h bonds is given below. explain the observed trend in pka. select the single best answer.