20 divide b + c divide for b=5,c=12 and d =6

1.18

Step-by-step explanation:

5+12=17 20diviede by 17=1.17647 rounded is 1.18

16

Step-by-step explanation: First, you have to plug in the numbers you already know. Since b=5 and c=12, your new equation would be 20 divided by 5 + 12. In this case, because of pemdas, you would divide 20 and 5 first. That leaves you with the equation: 4 + 12. Now from there, it's simple addition creating your answer, 16.

false

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.