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Lecture 2

CHEM 130 Lecture Notes - Lecture 2: Bromine, Chemical Reaction, Hydrogen Peroxide

2 pages81 viewsWinter 2019

Course Code
CHEM 130
Charles Mc Mory

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Friday, January 11, 2019
Chem CH 1 Lecture notes
1.1:An Atoms first approach
Clicker question
ANSWER: B center Target
matter is composed of various types of atoms and one substance changes to another by
reorganizing the ay atoms are attached to each other
atom: the smallest part of an element that is still that element
Molecules: two or more atoms joined together and acting as a unit
Elements exist in different states in matter
Diatomic molecules: some molecules exist injure form with two atoms
Some exist as diatomic molecules: two atom
oxygen: o2
Hydrogen: h2
OTHERS: H2, N2, F2, O2, I2, CI2, Br2
Chemical reaction: one substance change to another by reorganizing the way thee atoms are
attached to each other
1.2: scientific method (more outlined in text)
Theory: a set of assumptions put forth to explain some aspect of the observed behavior of
Often called a model: the models of chemistry usually involve assumptions about the
behavior of individual atoms or molecules
Natural law: statement that expresses generally observed behavior
1.4 Fundamental chemical laws
Law of conservation of mass: mass is neither created nor destroyed
All chemical equations must obey the law of conservation of mass
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