Among three bases, X−X−, Y−Y−, and Z−Z−, the strongest one is Y−Y−, and the weakest one is Z−Z−. Rank their conjugate acids, HXHX, HYHY, and HZHZ, in order of decreasing strength.

Rank (in order of decreasing strength):

HZ

HX

HY

Step-by-step explanation:

The Stronger the base the weaker its conjugate acid.

The strongest base is Y-, then the weakest conjugate acid is HY.

The weakest base is Z-, then the strongest conjugate acid is HZ.

Between them is the pair composed by X- and HX

step-by-step explanation:

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.