### Exam 2 - Atomic Theory and Bonding

##### What the Student Brings to Exams
• official UT ID card (with your picture and name on it)
• a simple scientific calculator (not a graphing calculator)
• a pencil(s) and eraser
• memorized formulas in your head - not on paper or anything else
• nothing else is allowed
##### What we provide for the Exams
• A printed copy of the exam (every exam has a unique version number on it).
• An exam cover page that has ALL needed conversion factors and data. No formulas will be given.
• A periodic table of the elements with symbols, atomic number, and atomic weights.

##### Work Function (Φ) Equation

$E_{\rm k} = {1\over 2} m v^2 = h\nu - \Phi$

$$E_n = -{{\cal R}\over n^2}$$

$$\Delta E = {\cal R} \left({1 \over n_f^2} - {1 \over n_i^2}\right)$$

$$\lambda = {h\over mv}$$

$$\Delta x \cdot m\Delta v \geq { h \over 4 \pi }$$

##### More to Memorize...

Nomenclature: Know how to name various ions and polyatomic ions. Know how to name ionic compounds (salts) and simple covalent compounds.

Metric Prefixes: Make sure you know the differences in pm, nm, μm, mm, cm, km ? How about Hz, kHz, MHz, GHz, THz ?

##### What we provide on the exam cover page

c = 3.00 × 108 m/s

h = 6.626 × 10-34 J·s

R = 8.314 J/mol K

$${\cal R} = 2.18\times 10^{-18}\;{\rm J}$$

NA = 6.022 × 1023 mol-1

$$m_{\rm electron} = 9.11 \times 10^{-31}$$ kg

$$m_{\rm proton} = 1.673 \times 10^{-27}$$ kg

$$m_{\rm neutron} = 1.675 \times 10^{-27}$$ kg

$$e^- = 1.602 \times 10^{-19}$$ C

1 W = 1 J/s    (power in watts, W)

1 eV = $$1.602 \times 10^{-19}$$ J