There are four naturally occurring isotopes of
the element chromium. the relative abundance
of each is
50cr 4.345% 49.946044 amu
52cr 83.789% 51.940508 amu
53cr 9.501% 52.940649 amu
54cr 2.365% 53.93880 amu
find the average atomic mass of chromium.
1. 51.996 amu
2. 53.2503 amu
3. 52.061 amu
4. 52.978 amu

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

Which item is most likely part of the safety contract