Ineed a slogan that would sell the element lead. an example with the element arsenic 's a sure fire way to deal with a nasty rat. it works better than a mean old cat! !

Need to build a tower so high? Use lead to build and make it reach towards the sky! (Lame, I know, but it can help. I had the same project, in fact, but I was doing Titanium)

Dont like someones head?fill it with lead!

It will fall off and tip over. 

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.