When writing the name for a compound containing a transition metal, a roman numeral is placed in between the two elements. What does the roman numeral signify?
a. The number of protons in the transition metal
b. The number transition metal atoms in the compound
c. The number of the non metal atoms in the compound
d. The oxidation number of the transition metal

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant. 

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