Periodic Law

Front

What is a valence electron?

Back

An electron that resides in the outermost shell of an atom, involved in chemical bonding.

Front

How does atomic size change across a period from left to right?

Back

The size of the atom decreases due to increased nuclear charge pulling electrons closer.

Front

How did Mendeleev arrange the elements in his periodic table?

Back

He arranged the elements by increasing atomic mass.

Front

What are metals?

Back

Elements that are shiny, conduct electricity and heat, and are malleable.

Front

Which atom has the largest atomic radius: magnesium, chlorine, barium, or selenium?

Back

Barium has the largest atomic radius.

Front

What is the periodic law?

Back

The properties of elements are a periodic function of their atomic numbers.

Front

What is an atomic radius?

Back

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

Front

What are nonmetals?

Back

Elements that are generally poor conductors of heat and electricity and are not shiny.

Front

What is the trend in ionization energy across a period?

Back

Ionization energy generally increases as you move from left to right across a period.

Front

What is electronegativity?

Back

A measure of the tendency of an atom to attract a bonding pair of electrons.