A 49. OO at the right is inscribed in square ABCD and circumscribed
about square PQRS. Which is smaller, the blue region or the yellow
region? Explain.
P
s
R
50. Circles T and U each have radius 10 and TU = 10. Find the area of the
region that is contained inside both circles. (Hint: Think about where T
and U must lie in a diagram of OT and OU.)

I need help on the same one!!

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons

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.