1. Element
2. Sugar and window cleaner
3. Heterogeneous mixture.
<span>To work out the volume of something from its density, use the compound measures triangle: mass over density and volume. To find volume that the beaker holds, divide the mass by the density. V = (388.15 - 39.09)/1. V = 349.06g/cm3. To find the weight of the beaker and the contents, first work out the weight (mass) of the mercury, with this formula: mass = d x v. M = 13.5 x 349.06. M = 4712.31. Then add on the weight of the beaker (39.09g). The total weight is 4751.40g.</span>
They all have 2 elections in the outer S orbital, and 4 electrons in the P orbitals.
To be honest, I learned this in school so I'll tell you XD
The formula of sodium oxide is Na2O
