The Greek letter δ (delta) is used to signify . a) an ion
b) a charged particle
c) a mixed number
d) a small fraction
e) none of the above

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.

What happens when light is scattered?

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm