Periodic Trends Quiz

What is the atomic radius?

• The distance between two adjoining nuclei in a molecule

• The distance from the nucleus to the outermost edge of the electron cloud

• The region occupied by fast-moving electrons

• The energy needed to remove an electron from an atom

What is electron affinity?

• The distance between two adjoining nuclei in a molecule

• The change in energy that occurs when an electron is added to a neutral atom

• The region occupied by fast-moving electrons

• The energy needed to remove an electron from an atom

Who was the first to organize the elements by their atomic masses?

• Dmitri Mendeleev

• Henry Moseley

• Joseph John Thomson

• Niels Bohr

What is ionization energy?

• The distance between two adjoining nuclei in a molecule

• The change in energy that occurs when an electron is added to a neutral atom

• The energy needed to remove an electron from an atom or ion

• The region occupied by fast-moving electrons

What is a metal?

• An element that is generally a poor conductor of heat and electricity

• An element that is malleable and usually conducts heat and electricity well

• The region occupied by fast-moving electrons

• The energy needed to remove an electron from an atom

What is a nonmetal?

• An element that is generally a poor conductor of heat and electricity

• An element that is malleable and usually conducts heat and electricity well

• The region occupied by fast-moving electrons

• The energy needed to remove an electron from an atom

Which group of elements in the periodic table are known as alkali metals?

• IA

• II A

• VII A

• VIII A

What is a periodic trend?

• A predictable pattern in the periodic table

• The distance between two adjoining nuclei in a molecule

• The region occupied by fast-moving electrons

• The energy needed to remove an electron from an atom

What is shielding effect?

• The process of covering an element with a protective layer to prevent reactions.

• The phenomenon where inner electrons partially block the attraction between the nucleus and outer electrons.

• The ability of an element to form chemical bonds with other elements.

• The tendency of electrons to repel each other in the same energy level.

What is the trend of atomic radius across a period?

• Increases from left to right

• Decreases from left to right

• Increases from top to bottom

• Decreases from top to bottom