A.) top to bottom:
900, 1000, 1200
B.) top to bottom:
250, 450
A cold air mass moves into an area of warm air
As the volume of the container increases, the gas pressure decreases. They are directly proportional. This is supported by Boyle's Law.
The modern definition of electronegativity is due to Linus Pauling. It is the power of an atom in a molecule to attract electrons to itself.
When the electronegativity difference between the two atoms is greater than 2.0, the bond is considered ionic; i.e. there is complete transfer (between the two atoms) of the electrons in the bond. The electronegativity (according to Pauling scale) of chlorine is 3.0, while the electronegativity of sodium is 0.9.
So, electrons are transferred because of a larger electronegativity difference.
Since density is = to mass/volume, you would do this:
