What is the reason for a decreasing atomic radius within one period?

The molecular geometry of the central atom in SF4 is ________, and this molecule is_____.       

Density is an intensive property of a substance. This means that the density of ten glass beads (the same type of glass):

What is the molarity of the hydrochloric acid if the student used 45.25 mL of 0.09455M standard solution of NaOH to titrate 20.00 mL of acid to the endpoint?

As you move down a group of elements (family), the number of valence electrons 

The density of fluorophosphate glass is 4.2g/cm3. Determine the volume in in3 of 4.265 lb glass sample.  

The particle has 26 protons but only 23 electrons. Can you tell me the name of it?

What does LiF actually stand for?

How many grams are in 0.125 moles of Ca(OH)2? (MM=74.093g/mol)

Consider the reaction between 50.0 mL of 0.200 M sodium hydroxide and 75.0 mL of 0.100 M HCl.  How many moles of sodium chloride will be produced? Hint: This is a limiting reactant problem