2 Na + Cl2 --> 2 NaCl 15 mol Na reacts with15 mol Cl2 to produce NaCl.
If a student carries out this procedure and obtains 12 mol NaCl, what is his percent
yield?

All the elements are arranged by melting points on the periodic table. in row they go from metals to gasses. in the row from sodium to argon, sodium is more reactive than the one on its right, magnesium.

7is b8 is d9 is c10 is a11 is d

Nonmetal are moldable and easily shaped

Vander waals forces are inter molecular bonds that exist within molecules of the same substance. a water molecule is made up of oxygen and hydrogen atoms which share electrons between each other. the vander waals forces are forces that exist between multitude of different  molecules of water. dipole dipole forces is the type of vander waals force that exist in water. the oxygen atom which is more electronegative pulls the shared electron closer to itself thus generating a partial negative charge while the hydrogen acquire a partial positive charge. these two different charges causes attraction to occur in water molecules.