Question

question 36 (1 point)
what is the element with the lowest electronegativity value?
cesium
fluorine
b
helium
calcium
question 37 (1 point)
what is the element with the highest electronegativity value?
fluorine
calcium
b
cesium
helium
question 38 (1 point)
which of the following elements has the smallest ionic radius?
o
u
b
s
k

Explanation:

• For Question 36: Electronegativity generally decreases down a group and increases across a period. Cesium (Cs) is a large alkali - metal atom with a low tendency to attract electrons. Helium (He) is a noble gas and does not typically form bonds (so electronegativity values are not well - defined in the traditional bonding sense for noble gases in this context). Calcium (Ca) is more electronegative than Cs. Fluorine (F) is highly electronegative.
• For Question 37: Fluorine (F) has the highest electronegativity value among the common elements. It is a small atom with a high nuclear charge relative to its electron shell, which makes it very good at attracting electrons.
• For Question 38: Ionic radius trends: For ions with the same electron configuration (isoelectronic series), the ion with the higher nuclear charge has a smaller radius. Also, as we move across a period, the ionic radius (for cations and anions) generally changes. Oxygen (O) forms \(O^{2 -}\). Sulfur (S) forms \(S^{2 -}\) which is larger than \(O^{2 -}\) because it has more electron shells. Potassium (K) forms \(K^{+}\) which is larger than \(O^{2 -}\). Uranium (U) forms ions with much larger radii due to its large atomic size.

Answer:

Question 36: a. cesium
Question 37: a. fluorine
Question 38: a. O