Ill mark brainlest if right

1000000000

Step-by-step explanation:

Step-by-step explanation:

Ok man, same as before.

Let's do it step by step

Since there's a 4^10 and a 4^5 on the other side, do that first.

You get 4^5

And now that there isn't the 4^5 on the bottom now, it's just 10^4*4^5

You cannot go further without simplifying into a huge number.  And, it's an answer.

2nd one in the first row is correct

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.