Why must one leg of a triangle that the Pythagorean triple represents need an even-numbered length?

Most of the square numbers are even.so if we need to find root over we need an even number to convert it to perfect square.

See the example below

Some other triplets are

i got 10.28 but that rounds up to 10.3

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.