Periodic Trends

Front

What happens to atomic size as you move across a period in the periodic table?

Back

Atomic size decreases as you move across a period due to an increase in the number of protons, which pulls the electrons closer to the nucleus.

Front

What happens to electronegativity as you move down a group in the periodic table?

Back

Electronegativity decreases as you move down a group because the increased distance between the nucleus and the valence electrons reduces the nucleus's ability to attract electrons.

Front

What is the trend in atomic radius as you move down a group in the periodic table?

Back

Atomic radius increases as you move down a group due to the addition of energy levels.

Front

Which element is a metalloid in the fourth period and in the same group as carbon?

Back

Germanium (Ge) is a metalloid in the fourth period and is in the same group as carbon.

Front

What is the trend in ionization energy as you move across a period?

Back

Ionization energy generally increases as you move across a period due to increasing nuclear charge.

Front

Define electronegativity.

Back

Electronegativity is the ability of an atom to attract electrons in a chemical bond.

Front

What is the relationship between atomic radius and ionization energy?

Back

As atomic radius decreases, ionization energy increases because the electrons are held more tightly by the nucleus.

Front

What is the trend in metallic character as you move across a period?

Back

Metallic character decreases as you move across a period from left to right.

Front

What is the significance of the periodic law?

Back

The periodic law states that the properties of elements are a periodic function of their atomic numbers.

Front

What is the trend in reactivity for alkali metals as you move down the group?

Back

Reactivity increases for alkali metals as you move down the group.