Which of the following vis not a needed piece of information when performing a rotation a) directionb) centerc) angle d) orientation

There's no concept of direction in a rotation. The direction is a concept proper of translation, where a vector (and thus its direction) defines the translation to apply to each point.

On the other hand, a rotation has a center, and you rotate by a given angle, in a given orientation (clockwise/counterclockwise).

D) Orientation

Step-by-step explanation:

A rotation is specified by its (Direction, Center, Angle). Unless you know these, you cannot do the rotation transformation. They are characteristics of the rotation transformation.

"Orientation" is a characteristic of the object. It has no relevance with respect to specifying a rotatation. (It is not altered by the rotation transformation.)

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.