Try 3 free problems on periodic trends, ions, valence electrons, and table patterns. Want more reps? Premium opens the full 174-problem bank in sets of 3, 9, or 18.
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
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174 problems across atomic radius, ionization energy, electronegativity, and periodic trends
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High School Chemistry · Unit 05 · Periodic Table & Trends Practice