The major visible difference between<span> the two are crystal size, </span>intrusive rocks<span> have a larger crystal/grain texture due to the slow cooling of magma below the earth surface which encourages the growth of larger crystals, while </span>extrusive rocks<span>, because of the rapid cooling at/above the earth's surface does the opposite. Hope I helped</span>
The oxidation number of iodine is 5 in Mg(IO3)2 which can be calculated as Mg(IO3)2 MgI2O6 As we know that Mg has +2 O has -2 So, (+2) + 2I + 6 (-2)=0 2 + 2I - 12 =0 10+ 2I =0 10 = 2I I =5
