Tabla periódica

Tabla periódica

Author's Instructions

Nombra elementos y pon símbolos

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Formulación ÓXIDOS

Chemistry - Science

FORMULACIÓN ÓXIDOS

Formulación HIDRUROS

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Formulación inorgánica

Parts of the plant

Chemistry - Science

Parts of the plant

Metals and Alloys

Chemistry - Science

Seven pictures of metals and alloys in typical applications. Six pictures have drop-down answers: the seventh is free-text (extension question). All photographs (c) Jon Tarrant.