CHEM 151 Lecture Notes - Lecture 1: Bohr Model, Chemical Formula, Chemical Element

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roseraccoon414

10 Jun 2016

School

University of Arizona

Department

Chemistry

Course

CHEM 151

Professor

Anglin

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Document Summary

Atomic model of substances- the particles that compose the substances in our surroundings have internal structure. Atoms-small units of structure within the atomic model of substances. Chemical bonds- strong attractive forces that hold atoms together. Molecules-composite particles, which are made up of two or more atoms of the same or different types bounded together. Differences in molecules result from differences in the types of atoms present in them or differences in the way these atoms are arranged in space (or both) Elementary substances: substances that cannot be split into two or more different substances. Chemical compounds: substances that we can split into two or more simpler stable substances by introducing a chemical reaction. Elementary substances are the smallest simple substances that we know. Metals- usually solids at room temperature and conduct heat and electricity well. Nonmetals- gases under the same conditions are poor conductors of heat and electricity. Metalloids- share some properties of metals and nonmetals.

Related Questions

please I need help with questions

Which of these statements about alloys and intermetallic compounds is false? (a) Bronze is an example of an alloy. (b) “Alloy” is just another word for “a chemical compound of fixed composition that is made of two or more metals.” (c) Intermetallics are compounds of two or more metals that have a definite composition and are not considered alloys. (d) If you mix two metals together and, at the atomic level, they separate into two or more different compositional phases, you have created a heterogeneous alloy. (e) Alloys can be formed even if the atoms that comprise them are rather different in size.

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WORD BANK:

Atomic solids

Body-centered cubic

Boiling point

Condensation

Covalent atomic solids

Crystal lattice

Crystalline solids

Distillate

Distillation

Dynamic equilibrium

Evaporation

Face-centered cubic

Freezing

Freezing point

Ionic solids

Intramolecular

Interionic forces

Intermolecular forces

Liquid State

Macromolecule

Melting

Melting point

Metallic atomic solids

Molar heat of fusion

Molar heat of vaporization

Molecular solids

Non-bonding atomic solids

Non-crystalline (amorphous) solids

Properties of Liquids

Properties of Solids

Simple cubic

Solid State

Sublimation

Surface tension

Surfactants

Vapor pressure

Vaporization

Viscosity

Wetting action

Use the Vocabulary words above to complete the following sentences words can be used more than once, some words are not be used.

d. The molecules of a ________ are in constant motion. e. The __________ of a liquid is related to the shape of the molecules that make up the liquid. f. The force of attraction that causes the surface of a liquid to contract and form a âbeadâ or spherical drop is called? _________ _______ g. Chemical that reduce surface tension are called? __________ h. A liquids ability to spread out evenly over a surface as a thin film is called itâs? _________ _______ i. ____________ is the process by which molecules of a liquid break away and go into the gas phase. j. When the molecules of a volatile liquid jump to gas phase it is called _________. k. The reverse of evaporation (the conversion of a vapor to a liquid) is called? _________ l. When the rate at which the water is evaporating is equal to the rate at which the water vapor is condensing, you have established a __________ _________. m. ________ _______ is the partial pressure of a gas in dynamic equilibrium with its liquid. n. ________ _______ is when the vapor pressure equals the atmospheric pressure. o. Boiling point can be used to purify a solution of two or more substances by ________. p. The condensed vapor sample is called the? ________ q. The exact quantity of heat required to vaporize 1 mole of a liquid at constant pressure and temperature is called the ________ ________ ___ __________. r. In ________________ __________ the particles do not have a definite or regular order (there is no repeating pattern throughout the solid). s. In ____________ __________, the particles are arranged in regular, systematic patterns called a ________ _________. t. The three different types of crystal lattices based on the cube are? ________ ______, _____________ ______, and ___________, ________. u. The three types of atomic solids include _________ _____, ___________ ______, and __________ ________.

CHEM 151 Lecture Notes - Lecture 1: Bohr Model, Chemical Formula, Chemical Element

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