What conjecture can you make about the sum of the frst 25 positive even numbers? Make a conjecture. Choose the correct answer below.
O A. The sum is equal to the number of terms squared.
OB. The sum is the product of the number of terms and the number of terms plus one.
O C. The sum is the product of the number of terms and two
OD. The sum is the product of the number of terms and the number of terms minus one.

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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.