What’s on the Why the Trends Happen poster
A 4-row table: Trend · Across → · Down ↓.
Two factors compete: more protons pull harder, more shells push the outer electrons further away.
- Atomic radius — decreases — increases
- Ionisation energy — increases — decreases
- Electronegativity — increases — decreases
- Metallic character — decreases — increases
Across a period: same shells, more protons, so a tighter pull. Down a group: more shells, so more shielding.
Questions about the Why the Trends Happen poster
- What’s on the Why the Trends Happen poster?
- A 4-row table: Trend · Across → · Down ↓. Two factors compete: more protons pull harder, more shells push the outer electrons further away. Atomic radius — decreases — increases; Ionisation energy — increases — decreases; Electronegativity — increases — decreases; Metallic character — decreases — increases. Across a period: same shells, more protons, so a tighter pull. Down a group: more shells, so more shielding.
- Who is the Why the Trends Happen poster for?
- Why the Trends Happen is filed under 10th Grade (ages 15–16), so it matches what that year asks a child to remember. It is equally useful to an older student revisiting science, and to the parent or teacher answering the question at the kitchen table.
- When should you use the Why the Trends Happen poster?
- Every trend comes from nuclear charge versus shielding. Learn the cause, not the four arrows. A wall chart earns its place by being glanceable from where the work is happening, so Why the Trends Happen belongs on the wall where that science work actually happens, within glancing distance, rather than filed away.
- What other posters go with Why the Trends Happen?
- Acids and Bases, Balancing Equations and Covalent Bonding sit alongside Why the Trends Happen in the 10th Grade set. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Acids and BasesBalancing EquationsCovalent Bonding
- Is the Why the Trends Happen poster free to download and print?
- Yes. Why the Trends Happen downloads as a free PDF with no account, no email and no watermark, like everything else in the 10th Grade set. 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 Why the Trends Happen poster print at?
- Why the Trends Happen 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 Why the Trends Happen loses nothing.Printing guide
Related posters
Charts that sit alongside Why the Trends Happen on the same wall.
Browse every 10th Grade poster, or start from the full catalogue.