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CHEM 102 LECTURE NOTES WEEK 1 TO WEEK 7 / EXAM 1 STUDY GUIDE (With periodic table and diagram illustrations) £6.78   Add to cart
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CHEM 102 LECTURE NOTES WEEK 1 TO WEEK 7 / EXAM 1 STUDY GUIDE (With periodic table and diagram illustrations)
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CHEM 102 LECTURE NOTES WEEK 1 TO WEEK 7 / EXAM 1 STUDY GUIDE (With periodic table and diagram illustrations)

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  • September 9, 2024
  • 9
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • chem 102 lecture notes week 1 to week 7 exam 1

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  • Chem 102
  • Chem 102

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CHEM 102 LECTURE NOTES WEEK 1 TO WEEK 7 / EXAM 1 STUDY GUIDE
(With periodic table and diagram illustrations)



Using Conversion factors

1000 g = 1 kilogram

Scientific Notation:

2000 g = 2 x 103 g

Significant Figures:

Nonzero integers always count as significant figures. Leading zeros are zeros that precede all the
nonzero digits. These do not count as significant figures. Captive zeros are zeros between
nonzero digits. These always count as significant figures. Trailing zeros are zeros at the right end
of the number. They are significant only if the number contains a decimal point.
5.03 (3 sig figs) 9.300 (4 sig figs) 1 5 0 (2 sig figs)

Multiplying or dividing: Use the same number of significant figures (SF) as the measurement
with the fewest significant figures.

Adding or subtracting: Use the same number of decimal places as the measurement with the
fewest decimal places.


Density: compares the mass of an object to its volume, the mass of a substance divided by
its volume

G/L for gases g/cm3 or g/mL for solids and liquids 1cm3 = 1ml D = m/V




Periodic Table

Groups contain elements with similar properties in vertical columns (alkali metals, alkaline
earth metals, transition metals, halogens, noble gases, lanthanides, actinides)

Periods are the horizontal rows of elements

Metals, nonmetals, metalloids

, Atoms and Orbitals

The atom contains:
Electrons: found outside the nucleus; negatively charged. Protons: found in the nucleus;
positive charge equal in magnitude to the electron’s negative charge. Neutrons: found in the
nucleus; no charge; virtually same mass as a proton.




Each element has a unique atomic number equal to the number of protons in the atom. In all
the atoms of a neutral element the number of protons equals the number of electrons

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