A small part of a crystal lattice is sketched below. The unit cell is outlined in red. crystal.jpg How many atoms of each type are in the unit cell?

Which of the following lists of elements is correctly ordered in terms of decreasing electronegativity?

Identify all the sp3 hybridized carbon atoms in this molecule. Advanced Theories of Covalent Bonding I 3-1.jpg

Select the Lewis dot diagram for a Br+ cation.

A 10.00 L tank at 25.0°C is filled with 18.0 g of nitrogen trifluoride gas and 14.0 g of xenon tetrafluoride gas. You can assume both gases behave as ideal gases under these conditions. What is the partial pressure (atm) of xenon tetrafluoride?

It takes 155 kJ/mol to break a fluorine-fluorine single bond. Calculate the maximum wavelength of light for which a fluorine-fluorine single bond could be broken by absorbing a single photon. Be sure your answer has the correct number of significant digits.

Select the electron configuration for a neutral atom of aluminum.

Write the electron configuration of an atom of the element highlighted in this outline of the Periodic Table: electronconfiguration2.jpg [BLANK-1]

How many valence electrons are in the sulfite ion (SO32-) ?

Atomic Absorption Photometry is considered the Reference Method for the measurement of: