If element X has an atomic mass of 32 amu, and element Z has an atomic mass of 118 amu, and element U has an atomic mass of 2 amu, what is the
percent by mass of Z in the following?
ZU3X

Who is better, messi or cristiano, i need this for a chemistry class. asap

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

Now look at the segment of the graph between the two data points marked with black squares. describe how the boiling point and melting point plots behave between these points. be as specific as possible.