Periodic Trends

Front

What is electronegativity?

Back

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

Front

Which halogen has the smallest electronegativity?

Back

Astatine (At) has the smallest electronegativity among the halogens.

Front

Who is known as the founder of the current periodic table system?

Back

Dmitri Mendeleev is credited with creating the first widely recognized periodic table.

Front

What is the term for the rows in the periodic table?

Back

The rows of the periodic table are called periods.

Front

What are metalloids?

Back

Metalloids are elements that have properties of both metals and nonmetals.

Front

List the metalloids in the periodic table.

Back

The complete list of metalloids includes B, Si, Ge, As, Sb, Te, and Po.

Front

What is the trend in atomic radius across a period?

Back

Atomic radius decreases from left to right across a period due to increasing nuclear charge.

Front

What is the trend in atomic radius down a group?

Back

Atomic radius increases down a group due to the addition of electron shells.

Front

What is ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom in the gas phase.

Front

What is the trend in ionization energy across a period?

Back

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