Why is hydrogen a non metal, usually placed with group I element in the periodic table, even though it does not show a metallic property like the alkali metals?

What happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?

How heavy is thanos? a) 3000 lbs b) all of it c) the price of tea in china d) heavy enough

Which type of precipitation would most likely form when the surface air temperature is slightly below freezing and the air temperature increases as you move upward away from the ground?