Find the discriminant of the quadratic equation, and determine the number of real solutions of the equation.

2x2 + 6x + 9 = 0

The discriminant is
The number of real solutions of the equation is

Discriminant is -36 and the number of real solution and its 2 imaginary solutions.

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.