The diameter of an atom varies between 62 and 520 pm, depending on on the specific type of atom.
area of a circle is pi x radius^2 so... pi x 4^2 = about 50 cm
a moderate estimate, not expensive, reasonable in price
A reasonable estimate is 1000. The actual total is 1016.
A reasonable estimate of the sum of 78 and 119 is 197.
200000000000000000000000000000000000000
1.1 to 3.5 *10^-10 metres.
A circle with a radius of 12 inches has a circumference of 75.4 inches.
It is: 16*pi square cm
The circumference is 50.3 inches.
area of a circle is pi x radius^2 so... pi x 4^2 = about 50 cm
Atomic radius is simply the radius of the atom, an indication of the atom's volume.
Scandium empirical atom radius: 160 pm Scandium calculated atom radius: 184 pm
The radius of an anion is bigger than the radius of a neutral atom.
An iodine atom has one more principal energy level than a bromine atom. Therefore the radius of an iodine atom is greater than the latter.
The atomic radius of a cation is smaller than that of its original atom. See the related link for an image example of what this may look like.
a moderate estimate, not expensive, reasonable in price
Estimate the answer. If the calculated answer is close to the estimate then it is reasonable.