PERIODIC TRENDS

Front

What is electronegativity and how does it change across a period and down a group?

Back

Electronegativity is the ability of an atom to attract electrons in a chemical bond. It increases from left to right across a period and decreases from top to bottom within a group.

Front

Why does atomic radius increase as you move down a group in the periodic table?

Back

Atomic radius increases down a group because more shells (energy levels) are added, which increases the distance between the nucleus and the outermost electrons.

Front

Which element has the largest atomic radius in Group 18?

Back

Radon (Rn) has the largest atomic radius in Group 18.

Front

What happens to atomic radius as you move from left to right across a period?

Back

Atomic radius decreases from left to right across a period due to the increase in the number of protons, which increases the attraction to electrons.

Front

Which element has the largest atomic radius in Period 4?

Back

Potassium (K) has the largest atomic radius in Period 4.

Front

Define atomic radius.

Back

Atomic radius is the distance from the nucleus of an atom to the outermost shell of electrons.

Front

What is the trend of ionization energy across a period?

Back

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

Front

Explain the trend of ionization energy down a group.

Back

Ionization energy decreases down a group due to increased distance between the nucleus and the outermost electrons, making them easier to remove.

Front

What is the relationship between electronegativity and ionization energy?

Back

Generally, elements with high electronegativity also have high ionization energy, as both properties are related to the attraction of electrons.

Front

What is the significance of noble gases in periodic trends?

Back

Noble gases have complete valence shells, making them stable and generally unreactive, which affects trends in electronegativity and ionization energy.