Periodic Trends Review

Which of the following will have a larger radius than Zinc?

• Magnesium

• Strontium

• Copper

• Iron

The element with the lowest electronegativity in Period 3 is:

• Sodium (Na)

• Magnesium (Mg)

• Aluminum (Al)

• Silicon (Si)

What is the general trend for ionization energy across a period?

• Ionization energy decreases.

• Ionization energy remains constant.

• Ionization energy increases.

• Ionization energy fluctuates.

What is atomic radius?

• The distance from the nucleus of an atom to the outermost shell of electrons.

• The size of an atom measured from the center to the outermost electron.

• The total number of electrons in an atom.

• The distance between two nuclei of adjacent atoms.

What happens to the size of an atom when it gains an electron?

• It generally decreases in size (cations are smaller than their parent atoms).

• It remains the same size as the parent atom.

• It generally increases in size (anions are larger than their parent atoms).

• It becomes unstable and breaks apart.

What is electronegativity?

• The ability of an atom to attract electrons in a chemical bond.

• The measure of an atom's size in a molecule.

• The energy required to remove an electron from an atom.

• The tendency of an atom to gain protons.

As you move across the periodic table, atoms tend to get smaller because:

• the atoms have more protons.

• the atoms have fewer electrons.

• the atoms have more neutrons.

• the atoms have larger electron shells.

What trend is observed in electronegativity as you move across a period?

• Electronegativity decreases.

• Electronegativity remains constant.

• Electronegativity increases.

• Electronegativity fluctuates.

What is ionization energy?

• The energy required to remove an electron from an atom.

• The energy released when an electron is added to an atom.

• The energy needed to break a chemical bond.

• The energy required to change an atom from solid to gas.

Which has the greater electronegativity: Cl or Al?

• Chlorine (Cl)

• Aluminum (Al)

• Bromine (Br)

• Fluorine (F)