The Real Periodic Table

Front

What happens to electron affinity as you move from top to bottom on the periodic table?

Back

Electron affinity decreases because the valence electrons are further from the nucleus.

Front

Which element has zero electron affinity?

Back

Ne (Neon)

Front

What causes the atomic radius to increase going down a group in the periodic table?

Back

The atomic radius increases because the valence electrons are further from the nucleus.

Front

What trend occurs in ionization energy as you move from left to right across the periodic table?

Back

Ionization energy increases because effective nuclear charge increases.

Front

How many valence electrons do all elements in group 2 have?

Back

2 valence electrons.

Front

Define effective nuclear charge.

Back

Effective nuclear charge is the net positive charge experienced by an electron in a multi-electron atom, accounting for shielding by other electrons.

Front

What is the trend of atomic radius across a period?

Back

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

Front

Explain why noble gases have high ionization energies.

Back

Noble gases have high ionization energies because they have a full valence shell, making it energetically unfavorable to remove an electron.

Front

What is the relationship between electronegativity and atomic size?

Back

Electronegativity generally increases as atomic size decreases, as smaller atoms attract electrons more effectively.

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.