1. The largest atomic radius is: (d) Cs
2. The element most likely to form an anion is: (c) F
3. The average atomic mass of gallium is 69.72 amu.
4. The element with the lowest first ionization energy is: (d) K
5. The element with the largest cationic radius is: (e) Rb⁺
6. The element with the highest electronegativity is: (a) F
7. The element most likely to form a covalent bond is: (c) Cl
8. The element with the highest first ionization energy is: (a) He
9. The correct order of increasing atomic radius is: (d) F < O < N < C < B
10. The element most likely to form a single covalent bond is: (c) Cl
11. The element most likely to form a metallic bond is: (a) Na
12. The element with the lowest electron affinity is: (b) Ne
Parent Tip: Review the logic above to help your child master the concept of worksheet periodic trends answer key.