Periodic Trends in the Periodic Table

It is the measure of the mean distance from the center of nucleus to the boundary of the surrounding cloud where the electron revolves.

• Electronegativity

• Atomic radius

• Electron affinity

• Metallic property

Given: Na, Cl, Ba, and Al.

Which has the greatest tendency to accept electrons to form negative ions?

• Na

• Cl

• Ba

• Al

Given: Al, O, Cl, and N.

Which has the greatest tendency to lose electrons to form positive ions?

• Al

• Cl

• O

• N

Which of the following are the characteristics of the most active nonmetals?

• Small radii and high ionization energies

• Large atomic radii and low ionization energies

• Small radii, low ionization energies

• Large atomic radii, high ionization energies

The element with the lowest ionization energy in Period 3 is __________________.

• Sodium

• Chlorine

• Magnesium

• Argon

Which periodic group has the smallest atomic radius?

• Alkali metals

• Halogens

• Noble gases

• Transition metals

The element with the highest electronegativity in the halogens is ________________.

• Astatine

• Fluorine

• Chlorine

• Bromine

Which element is the most metallic?

• Na

• Mg

• Cs

• Fr

The change of energy accompanies the addition of an electron to a gaseous atom.

• Electronegativity

• Atomic radius

• Electron affinity

• Metallic property

Given: At, F, Cl and Br.

Which sets correctly arranged the given elements in order of increasing electron affinity?

• At, Br, Cl, F

• F, Cl, Br, At

• Cl, Br, At, F

• Br, At, Cl, F