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CHM1045 Final Exam

A review from the study sheet I got from my CHM1045 class.

QuestionAnswer
Element cannot be seperated into simpler substances.
Compound two or more elements united chemically in definite proportions.
Mixture two or more substances in which the substances retain their chemical identities.
Physical Change Doesn't change chemical composition.
Chemical Change One or more substances are converted into other substances.
Plasma Similar to gas. Certain portion of the particles are ionized. (adapted from wikipedia)
Pure Substance matter with a fixed composition and distinct properties.
Mixture Combination of two or more substances in which each substance retains its own chemical identity.
Law of the Conservation of Matter total mass of the products of a chemical reaction = total mass of the reactants. Mass remains constant.
Scientific Method Ask a question - Research - Hypothesis - Test it - Analyze data and draw a conclusion - Report results
Mass Number he total number of protons and neutrons (together known as nucleons) in an atomic nucleus.
Avogadro's Number The number of ^12C atoms in exactly 12 g of ^12C; it equals 6.022 x 10^23.
Law of Definite and Multiple Proportions A law that states that the elemental composition of a pure substance is always the same, regardless of its source.
Types of Chemical Bonds Ionic: refers to electrostatic forces that exist between ions of opposite charge. Covalent bond: results from the sharing of electrons between two atoms. Metallic bonds: found in metals.
Oxidation a process in which a substance loses one or more electrons.
Reduction a process in which a substance gains one or more electrons.
Created by: Katie4theA