PLEASE HELP! Tillman the Bulldog held the Guinness World Record for the Fastest Dog on a
Skateboard. Tillman skated 100 meters in 19.678 seconds. After watching the
video, a student said, "Wow, that's amazing! The dog went about 5 meters per
second!" Was the student correct? How do you know?

He was correct

Step-by-step explanation:

100÷ 19.678= 5

5 meters for seconds

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.

answer: your correct answer is b. d.

step-by-step explanation: