Element X has 2 naturally occurring isotopes. The first isotope has an atomic mass of 44.009 amu and it’s percent abundance is 33%. The second isotope has an atomic mass of 40.5 amu and it’s percent abundance is 67%. What is the atomic mass of Element X A 39.99 amu
B 39.91 amu
C 40.42 amu
D 41.66 amu

Which is a difference between molecular compounds and ionic compounds? select the correct answer below: question 5 options: molecular compounds typically form between a metal and a nonmetal, while ionic compounds typically form between nonmetals. molecular compounds result from the transfer of electrons between atoms to form ions, while ionic compounds result from the sharing of electrons between neutral atoms. molecular compounds are formed of discrete, neutral molecules, while ionic compounds are formed of large repeating arrays of opposite charges. molecular compounds have high melting points and high boiling points, while ionic

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver

What is the amount of energy for a photon that has a 125 cm wavelength