True or false on periodic trends

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   A cation is smaller than its parent atom.

2. Statement is true

   No

   Statement

   An anion is smaller than its parent atom.

3. Statement is true

   Yes

   Statement

   Ionisation enthalpy rises across a period.

4. Statement is true

   No

   Statement

   Electronegativity can be measured directly.

5. Statement is true

   Yes

   Statement

   Atomic size falls across a period.

6. Statement is true

   No

   Statement

   Isoelectronic species have equal radii.

Instructions

Decide whether each statement is true or false.

Explanation