Soren Periodic Table
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Period 4

Period 4

First period containing a complete d block.

What changes

Across a period, properties change predictably.

Moving left to right increases nuclear charge while electrons enter the same principal shell — the key to several periodic trends.

Atomic radius ↓Ionisation energy ↑Electronegativity ↑
18

Elements in this period

19KPotassiumAlkali metal20CaCalciumAlkaline earth metal21ScScandiumTransition metal22TiTitaniumTransition metal23VVanadiumTransition metal24CrChromiumTransition metal25MnManganeseTransition metal26FeIronTransition metal27CoCobaltTransition metal28NiNickelTransition metal29CuCopperTransition metal30ZnZincTransition metal31GaGalliumPost-transition metal32GeGermaniumMetalloid33AsArsenicMetalloid34SeSeleniumNonmetal35BrBromineHalogen36KrKryptonNoble gas
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