Science stories kids actually want to read
Opening your story…
Riya and Kabir enter Ionora, the Kingdom of Ions, with their robot guide Sparky. Through glowing castles, electron-exchange bridges, and crystal lessons, they discover how atoms become charged: lose an electron to form a cation, or gain an electron to form an anion.
At a science fair booth called The Atom Detective Agency, Anika and Rohan learn atomic number, mass number, and isotopes — and how atoms of the same element can have different numbers of neutrons.
Tara and Neil explore the Atomic Explorer and learn Bohr’s atomic model — electron shells K, L, M, and N — plus electronic configuration, valence electrons, and how valency helps atoms combine.
Un cambio físico altera la forma, el tamaño o el estado sin formar una sustancia nueva (derretir hielo, cortar un limón, disolver azúcar). Un cambio químico produce una o más sustancias nuevas (tostar pan, quemar cera, oxidar hierro). Algunos cambios físicos son reversibles; los químicos suelen no serlo. En un sistema cerrado, la masa se conserva en ambos tipos de cambio.
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