The initial water level in a 10 -ml graduated cylinder reads 4.1 ml . after a ruby gemstone is dropped into the cylinder , the water level reads 7.1 ml what is the volume of the ruby ?

How do the energy differences between the higher energy levels of an atom compare with the energy difference between the lower energy level of the atom

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

What is the percentage of hydrogen in nitrogen trihydride