They discovered that *elements* show increase in atomic numbers across the period.
The compound NaCI is an example of a salt. Salt is formed from a neutralization action of an acid and a base. From the type of reaction itself, we can say that the pH should be neutral or at pH 7.0. No matter what type of acid or base is used.
Evaporation, distillation, filtration and chromatography
Hope it help you, have a nice day
<span>Percent yield is the measured recovery of a substance in grams divided by the theoretical amount of substance expected in grams (times 100 to convert to %). Undissolved Aluminum trihydroxide would add mass to the Aluminum sulphate one is making here. The measured mass would be inaccurately high, increasing the percent yield calculated.</span>
We all know, Density = Mass/ volume.
When volume increases and the mass remains the same , the density will decrease considerably.
