Types of Braces. Metal braces are made of high-quality, durable stainless steel. They are the most common type of braces. The brackets, which are bonded to the front of each tooth, are connected by the archwire, which helps guide the teeth into the correct positions. Today's metal braces are smaller, more comfortable and more attractive.
Check out some tips on how to choose switches and outlets while avoiding pitfalls at Kyleswitchplates.com. Devices marked CU-only are intended for use only with copper wire (wire systems with solid-core copper wiring) and should not be used with aluminium electrical wiring.heck out some tips on how to choose switches and outlets while avoiding pitfalls at Kyleswitchplates.com. Devices marked CU-only are intended for use only with copper wire (wire systems with solid-core copper wiring) and should not be used with aluminium electrical wiring.
The copper(II) means that the copper ion has a +2 charge. The symbol for copper is Cu, so that eliminates choice E. Since the symbol for chlorine is Cl and chlorine ions almost always have a -1 charge, and since the charges of the positive and negative ions have to balance out to be zero, that means CuCl2 would be the right answer (letter D).