What’s on the Period 3 poster
A 6-row table: Property · Trend.
Across period 3, sodium to argon.
- Atomic radius — Decreases
- Ionisation energy — Increases, with dips at Al and S
- Melting point — Peaks at silicon
- Electronegativity — Increases
- Oxide character — Basic → amphoteric → acidic
- Bonding in oxides — Ionic → covalent
Silicon's melting point peak is structural: it is a giant covalent lattice, while the others are metallic or simple molecular.
Questions about the Period 3 poster
- What’s on the Period 3 poster?
- A 6-row table: Property · Trend. Across period 3, sodium to argon. Atomic radius — Decreases; Ionisation energy — Increases, with dips at Al and S; Melting point — Peaks at silicon; Electronegativity — Increases; Oxide character — Basic → amphoteric → acidic; Bonding in oxides — Ionic → covalent. Silicon's melting point peak is structural: it is a giant covalent lattice, while the others are metallic or simple molecular.
- Who is the Period 3 poster for?
- Period 3 belongs to the Chemistry section rather than to a school year, because physical science is not something one grade owns. Anyone learning inorganic can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Period 3 poster?
- Metallic to non-metallic. Oxides go from basic through amphoteric to acidic. A wall chart earns its place by being glanceable from where the work is happening, so Period 3 belongs on the wall where that physical science work actually happens, within glancing distance, rather than filed away.
- What other posters go with Period 3?
- Catalysts, Complex Ions and Electrolysis sit alongside Period 3 in the Chemistry section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.CatalystsComplex IonsElectrolysis
- Is the Period 3 poster free to download and print?
- Yes. Period 3 downloads as a free PDF with no account, no email and no watermark, like everything else in the Chemistry section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Period 3 poster print at?
- Period 3 is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Period 3 loses nothing.Printing guide
Related posters
Charts that sit alongside Period 3 on the same wall.
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