1-as we move from left to right across the periodic table, what is the general trend? a) atomic radii increase. b) electronegativity decreases. c) nuclear shielding increases. d) metallic character decreases.

I want to say that it would be the 'atomic radius' that would increase. Because as this would happen, the atoms would then get smaller and smaller, mainly because the radius would just get smaller and also the atoms would also.

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.