What reading level is The proton?

The proton by Alfred B. Bortz is at a Level 10 reading level. Recommended for Upper Grades / Adult readers (Ages 16+).

What age is The proton appropriate for?

The proton is recommended for Ages 16+. HootRating: 14C (Clear).

What genre is The proton?

The proton is nonfiction — Science. Part of the Library of Subatomic Particles series.

Does The proton have any content warnings?

The proton has a HootRating of 14C (Clear). No specific content flags noted. On HootRated, every book is rated across four dimensions — emotional, physical, social, and thematic — to help parents make informed choices.

How many pages is The proton?

The proton by Alfred B. Bortz is 64 pages (approximately 7,397 words).

Reviewed by HootRated editorial · Last updated May 18, 2026

The proton

Alfred B. Bortz

The proton

Age Rating, Reading Level & Content Guide

by Alfred B. Bortz

Library of Subatomic Particles

Reading Level 10 14C Ages 16+ Sweet Spot Page-Turner

The text is written at a 10th grade reading level, the subject matter is intended for teens and adults (ages 16+), and the content is gentle with no concerning themes.

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About This Book

Explore the fascinating journey behind uncovering the proton, the tiny particle that shapes the unique traits of every element. Dive into the science that explains how the building blocks of matter create the world around us.

Themes

Science & NatureEducationalHistory

Quick Assessment

This is a Level 10 book with gentle content intensity. It's a Sweet Spot read — challenging text with gentle themes, ideal for advanced or 2e readers. No notable content concerns flagged. Written for readers ages 16+.

Why we rated The proton 14C

The proton is written at a Level 10 reading level across 64 pages (approximately 7,397 words). Strong independent readers around grade 11.0 can typically handle this book on their own; with parent or teacher support, The proton works for readers up to grade 12.0.

Read aloud, The proton takes about 49 minutes, which fits within a single read-aloud session.

We rate The proton as 14C ("Clear") because the content sits in the "Gentle" range — no conflict beyond everyday childhood experiences. Across our four dimensions (emotional, physical, social, thematic) the book reads as evenly gentle; no single dimension stands out as a concern.

No specific content flags were raised by community reviewers, which is consistent with the gentle intensity score.

Thematically, The proton explores science & nature, educational, and history — these threads give the book room to mean different things to different readers.

Good fit for

✓ Children in the Ages 16+ range — the maturity and attention span match the story's pacing.
✓ Reluctant readers who need fast-paced, hook-heavy stories to stay engaged.
✓ Kids drawn to stories about science & nature, educational, history.
✓ Readers who fall hard for one book and want a long series to live in — there are 5 more books in the Library of Subatomic Particles series.
✓ Curious kids who prefer real-world topics over made-up stories.

Maybe not for

! Readers whose emotional readiness lags behind their decoding skills — this book's intensity outruns its reading level, a classic "gifted kid" mismatch.