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 174-problem bank.
3 Free Sample Problems
Work these 3 to find out whether the periodic trends are starting to make sense as a system — or whether you need more time with the patterns before they do.
#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.
Prep for the test — not just the homework
The 3 free problems show you where you stand. The full bank is how you close the gaps before the test.
Randomized every time — fresh problems that force real understanding, not answer memorization
Full worked solutions — see exactly where your setup went off track, not just whether you were right
174 problems across atomic radius, ionization energy, electronegativity, and periodic trends
Quick (3), Standard (9), or Extended (18) — use whatever fits your schedule
Filter by type — focus on calculation, concept, or multi-step problems first
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High School Chemistry · Unit 05 · Periodic Table & Trends Practice