1. Explain why atomic radius decreases across a period from left to right.
2. Describe the trend in first ionization energy across Period 3 and provide reasons for
this trend.
3. Write the electron configurations for the elements sodium (Na), magnesium (Mg), and
aluminum (Al), and explain how these configurations relate to their positions in the
periodic table.
4. Describe the trend in electronegativity across a period and down a group in the
periodic table.
5. Compare the melting and boiling points of the elements in Period 3 and explain the
reasons for the observed trends.
6. Describe the trend in reactivity of the Group 2 elements (alkaline earth metals) with
water and explain this trend.
, 7. Explain how the solubility of Group 2 hydroxides changes down the group and relate
this to their use in agriculture.
8. Explain why the elements in Period 2 often exhibit anomalous properties compared
to the elements in subsequent periods.
9. Discuss the general properties of transition metals and explain how these properties
differ from those of the s-block and p-block elements.
10. Describe how the oxidation states of elements vary across a period and down a
group in the periodic table, with specific examples from both main-group and
transition elements.
2. Describe the trend in first ionization energy across Period 3 and provide reasons for
this trend.
3. Write the electron configurations for the elements sodium (Na), magnesium (Mg), and
aluminum (Al), and explain how these configurations relate to their positions in the
periodic table.
4. Describe the trend in electronegativity across a period and down a group in the
periodic table.
5. Compare the melting and boiling points of the elements in Period 3 and explain the
reasons for the observed trends.
6. Describe the trend in reactivity of the Group 2 elements (alkaline earth metals) with
water and explain this trend.
, 7. Explain how the solubility of Group 2 hydroxides changes down the group and relate
this to their use in agriculture.
8. Explain why the elements in Period 2 often exhibit anomalous properties compared
to the elements in subsequent periods.
9. Discuss the general properties of transition metals and explain how these properties
differ from those of the s-block and p-block elements.
10. Describe how the oxidation states of elements vary across a period and down a
group in the periodic table, with specific examples from both main-group and
transition elements.
