Food and Atomic Theory: Chemistry Basics PDF
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This document covers food and the atomic theory of matter. It covers concepts from chemistry including atoms, molecules, elements, compounds, and mixtures. The document contains helpful diagrams and explanations.
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FOOD AND THE ATOMIC THEORY OF MATTER SC/NATS1560 UNDERSTANDING FOOD LEARNING OBJECTIVES To define atoms, molecules, elements, compounds, and mixtures To explain the basics of chemical formulas and chemical reactions To define catalysts and isomers To define organic chemistry...
FOOD AND THE ATOMIC THEORY OF MATTER SC/NATS1560 UNDERSTANDING FOOD LEARNING OBJECTIVES To define atoms, molecules, elements, compounds, and mixtures To explain the basics of chemical formulas and chemical reactions To define catalysts and isomers To define organic chemistry, functional groups, monomers, polymers, and macromolecules To explain the basics of states of matter and phase changes 2 KINDS OF MATERIAL SUBSTANCES Mixture: most material substances are mixtures that can be separated and purified into simpler substances by physical means Pure substance: substance that cannot be further refined without losing its physical and chemical properties − molecule: smallest particle of a pure substance oxyge − Compound: pure substance that hydroge n can be decomposed into other pure n substances by chemical means − Element (or simple substance): wate pure substance that cannot be r decomposed into other substances Electrolysis of water. © Science Photo Library by chemical means 3 THE CHEMICAL ELEMENTS 4 FOODS AND NUTRIENTS Matter according to chemistry Material mixtures substanc es fractioning, refining, purifying pure compounds substances chemical analysis element s ATOMS AND MOLECULES Atomic theory: all material hydroge n atom substances are constituted of atoms Atoms bind to form molecules oxygen atom hydrogen gas molecule Element: substance oxygen gas water molecule composed only of atoms of molecul the same species Compound: substance e A molecule of H2O is about water 0.27 nm across composed only of identical molecules, each molecule composed of different A drop of water atoms contains about 1.5 1021 molecules 6 REVIEW What is the difference between an element and a compound? Adapted from © Toby Bridson What is the difference between a pure substance and a mixture? Adapted from © Toby Bridson 7
