Ah is gold and Rh is rhodium and Os is osmium and Ir iridium
<span> By definition, </span>oxidation number<span> is the charge left on the given atom when all the bonding pairs (of electrons) are broken, so the oxidation number of Br will be +1</span>
Answer: I am confident the answer is B
Explanation:
forgive me if im wrong
78 protons are found in platinum(pt).
B, millimeters because paper is really thin therefore it'd require small measurements for units.