3-1.
hom is conducting a survey for the school newspaper. He
ved 175 students at his school and found that 28 students
d the new iPhone, 44 students had a #Pad computer, and 110
udents had neither. Pham then made a Venn diagram to
illustrate the information.
*Phone
21
)
TtPad
37
Neither 110
a.
How did Pham determine the number of students who
have both Phones and iPads?
How many students have Phones or Pads? How did he find this?
Recall that 28 students had the new iPhone and 44 students had a Pad. Why cannot
Pham just add 28 +44 to get the answer to part (b)? Explain.

x=30

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.

answer: b

step-by-step explanation: