US NRC: The emergency planning zone (EPZ) varies depending on conditions, geography, and Demographics. Generally, the Plume Exposure Pathway EPZ is ten miles. Generally, the Ingestion Exposure Pathway EPZ is 50 miles. http://www.nrc.gov/about-nrc/emerg-preparedness/protect-public/planning-zones.html
Whichever radius you are referring to depends on yield.
35km
That depends on what you're referring to: The fireball radius (the nuclear explosion itself), the total anhiliation range radius, and etc. For example, the bomb launched on Hiroshima had a fireball of several hundred feet in radius, a 1km total destruction range radius, and severe damage for miles. For firepower bombs (nuclear bombs made for power show & not effectiveness) The Tsar bomba of USSR had 50~55 megatons of TNT firepower, a fireball with 1km+ radius, total destruction for miles, and created a sound shockwave that could be heard in Norway/Other far Northern European areas. Modern nuclear weapons don't have a single blast radius; the U.S. developed M.I.R.V.s (cluster nuclear bombs) that spread apart to create a shotgun blast of multiple nuclear explosions.
about 150,000,000 million acres
Pretty much anything within the grid radius of the 104 nuclear power plants in the US, and the several hundred worldwide.
The nuclear radius R is related to the mass number A as follows:R=RoA1/3,where Ro =constant=(1.2 to 1.7) x 10 -15Thus nuclear radius varies as A1/3
Whichever radius you are referring to depends on yield.
Nuclear reactors have a large thickness of shielding (concrete mainly) around them which reduces any radiation outside the reactor to hardly more than normal background.
35km
Increasing positive nuclear charge
I don't know what radius you want, but whichever one it depends on yield.
That depends on what you're referring to: The fireball radius (the nuclear explosion itself), the total anhiliation range radius, and etc. For example, the bomb launched on Hiroshima had a fireball of several hundred feet in radius, a 1km total destruction range radius, and severe damage for miles. For firepower bombs (nuclear bombs made for power show & not effectiveness) The Tsar bomba of USSR had 50~55 megatons of TNT firepower, a fireball with 1km+ radius, total destruction for miles, and created a sound shockwave that could be heard in Norway/Other far Northern European areas. Modern nuclear weapons don't have a single blast radius; the U.S. developed M.I.R.V.s (cluster nuclear bombs) that spread apart to create a shotgun blast of multiple nuclear explosions.
decreases because of increased nuclear charge
pico meter
atomic radius
Phosphorus has larger ionic radius than sulfur. There is more nuclear attraction in sulfur.
a larger nuclear charge