Lesson
Lesson 1 — Atoms and Elements
Core idea
Matter is made of atoms, and atomic number identifies the element. The formula H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O remains readable in the English interface.
Lesson
Matter is made of atoms, and atomic number identifies the element. The formula H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O remains readable in the English interface.