Describe the relationship between a radian and a degree.

Here's a start:

"degree measures of angles, radian measure of angles" are two mathematically related units of measurement of angles.

One full circle, measured in degrees, is represented by 360 degrees.  

One full circle, meas. in rad., is repr. by 2pi radians.

Thus, 2pi radians = 360 degrees.

If you are given an angle in degrees, you can obtain the measure of the same angle in radians by mult. the given angle by the following conversion factor:

2 pi radians

360 degrees

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.