Question

1 (6)Uranium has three naturally occurring isotopes 22U, 235s2U, and 3 2U. The isotope Uranium-235is considered to be "weapons grade uranium" and can be used to make atomic weapons. The fractional abundances for two of the uranium isotopes are uranium-238-99.274% and Uranium-234-0.005%. The molecular mass of natural uranium is 237.9758amu. What is the fractional abundance of weapons grade uranium using these numbers (note: the number on the periodic table takes into account isotopes that aren't natural so use the numbers provided here.)? Which of the following is a cation? 14) (4) a. Na b. Na c. CI d. C What is the chemical formula for the compound sodium chloride (table salt)? 15) (4) 16) (4) What is the name of the compound with the formula LiF?

Answer 1

14) Cation contains elements with a positive electrical charge

So Cation is Na+

That is sodium ion (A)

15) Sodium chloride (table salt) formula is NaCL

16) LiF is lithium flouride