There are 35 problems that are worth 2 or 6 points. there are 110 points available on the test. find the number of each type of test question.

There are 25 two point questions, and 10 six point questions

Step-by-step explanation:

First note that if all the questions were value 6, this would give 6x35 = 210 points.

Each time we swap a 6 point question to a 2 point question, the totl points decrease by 4.

So as 110 is 100 less then 210, and 100÷4 =25, this means we know that if we decrease the number of 6 point questions from 35 to 10 (i.e. 35-25), this should give the answer.

So i.e. there are 10 six point questions, meaning there are 35-10 = 25 two point questions. (we can also check this does indeed give 110, as

10x6 + 25 x2 = 60 +50 = 110 )

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.

ratio is 2 : 9

the answer is three

13.5 : 3