27.6 - 22.3 = 5.3; you simply subtract the old density from the new density.
A diatomic molecule has a valency of two(2) for a non metal it ,will be negatively charged whereas for a metal, it will be positively charged
Answer:“If we’ve covered all of the potential sources, and we know the unique signature of the sand from these different sources, and we find it on a beach somewhere, then we basically know where it came from,” explained Barnard.
Explanation:
Answer:
When objects collide, energy can be transferred from one object to another, thereby changing their motion. Energy can also be transferred from place to place by electric currents, which can then be used locally to produce motion, sound, heat, or light.
22Na and 23Na is the notation that represents different isotopes of the element sodium.