Question

I learnt from a video in YouTube about the periodic table according to which I have a doubt.

I learnt that hydrogen is the lightest element, it has atomic number:1. Uranium is the heaviest element, having atomic no. :92.
Hence,somehow it tells us about the heaviness of a particular element.
My doubt is:
Periodic table doesn't end with Uranium, it ends with an element having atomic no. :118 because that scientists have created some man made elements too. But if there is an element having atomic no.:118,is Uranium still the heaviest element? If so, why is Uranium isn't the last one in the periodic table?
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Answer 1

Oganesson or ununoctium is the element with the largest number of protons, which is presently element 118. It is the heaviest man-made element currently on the periodic table, weighing with a huge atomic mass of about 294.
Uranium with atomic no. 92 and atomic weight 238.0289 is the heaviest natural occuring element.(In terms of atomic weight)Osmiumis the heaviest element of all (22.61g per cubic centimetre) in terms of density. It weighs approximately twice as much as lead.