Http://chemistry.about.com/od/chemistryterminology/a/What-Is-The-Difference-Between-Molarity-And-Mol...
Answer:
This structure shows that, "<span>Water is polar, which means it has an uneven distribution of charge making it a good solvent of other polar molecules".
Explanation:
When the Electronegativity difference between two atoms joint through covalent bond is greater than 0.4 and less than 1.7, then the bond is said to be polar bond, and molecule containing polar bonds with asymmetry are said to be polar molecules. In water the Electronegativity difference between Oxygen atom and Hydrogen atom is calculated as,
E.N of Oxygen = 3.44
E.N of Hydrogen = 2.20
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Difference 1.24
Hence, the bond is Polar covalent bond.
Secondly, as we know that Like dissolves Like, so water being polar in nature will interact with polar compounds. And polar compounds will tend to dissolve in water. So, water is a good solvent for polar compounds.</span>
Answer:
Noble Gases
Explanation:
Noble gases are very unreactive because they already have a full valence shell and therefore, do not need to bond.
The atomic number is the total number of protons in the nucleus. The mass number is the total number of particles in the nucleus. That includes the neutrons and the protons. So, the atomic number is 31. When you look at the element on the periodic table with a designated atomic number of 31, that would be Gallium, with a symbol of Ga. Mass number is 31 + 36 = 67. So, the answer is A.
Answer:
See the attachment for the filled in chart.
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