Start with 3 free Unit 05 practice problems. When you want more practice with periodic trends, ions, valence electrons, and table patterns, premium unlocks Quick Sets of 3, Standard Sets of 9, and Extended Sets of 18 from this 84-problem bank.
3 Free Sample Problems
Start here and see whether the periodic table is beginning to feel predictable or whether you want a few more passes with the trends.
#4Electronegativity
Calculate the electronegativity difference (ΔEN) for the Na–Cl bond. Na EN = 0.93, Cl EN = 3.16.
#5Ion Formation
When a metal atom forms a cation (loses electrons), its radius compared to the neutral atom is…
#6Trends Comparison
Rank these four atoms from HIGHEST to LOWEST first ionization energy: K, Na, Li, Cs.
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84 practice problems in this unit bank
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The full sets give you more chances to connect groups, trends, ions, and valence ideas until the table starts to behave more like a map.