Elements Compounds and Mixtures Atom Basic unit of
Elements Compounds and Mixtures
Atom • Basic unit of matter • Structure= Protons + Electrons. Neutrons ± • Cannot break down further
Atoms • Atoms are made up of electrons neutrons and protons.
Elements The Most Basic Form of Matter • Elements are made up of identical atoms. Elements are pure substances that cannot broken down in to simpler substances. Gold
Compound • Pure substance • 2+ atoms Chemically combined • Definite ratio • Can separate using Chemical means – Electrolysis – Combustion
Compounds Made up of two or more elements in a specific or definite ratio. NH 3 CH 4
H 2 and 02 H H O
Chemically Combine to form H 2 O H H O
Mixture • Impure Substance • Physically combined • Indefinite ratio • Can separate using physical means – Filtration – Chromatography – Properties differences
Mixture • Mixture is two or more substances that retain their identity.
Tyndall Effect No! John Tyndall Yes!
Tyndall= DON’T see light particles= colloid
Mixture Homogeneous Heterogeneous Solution Colloid Suspension Can’t see particles Visible particles Never settles Eventually settles in to layers No Tyndall Effect Yes the Tyndall Effect is observed
Quick Quiz: which would be the element? Compound? Mixture?
Reflection: DRAW and FILL IN Elements, Compounds, Mixtures Ex. Elements Compounds Definition Ex. HINT!!! May be on test Ex. Mixtures Definition Ex. Hetero- Homo- Def. Ex.
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