Chemistry Essentials — TEAS & HESI Cheat Sheet
Atoms, pH, reactions
👤 By the CinnaEntry Content Team
🕐 Updated 2026-09-06
🏷️ TEAS Science
🔖 Free to read, print, and share
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Use this one-page guide to lock in Chemistry Essentials for the ATI TEAS 7 and HESI A2. Keep it handy during review and on exam day.
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📒 The 1-minute cheat sheet
📌 Atoms
- Protons (+) and neutrons (0) in the nucleus
- Electrons (−) orbit the nucleus
- Atomic number = # of protons
📌 Ph Scale (0–14)
- < 7 acidic · 7 neutral (water) · > 7 basic
- Each unit = 10× change in H⁺
✅ Reactions
- Reactants → products
- A catalyst speeds a reaction and is NOT used up
- Enzymes = biological catalysts
✨Quick Tip
Focus on the highlighted terms — those are what the TEAS and HESI test most on chemistry essentials.
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