1.* write electron configurations for the 2 + 2 plus cations of these elements.

a. fe
b. co
c. ni
2.write electron configurations for the 3 + 3 plus cations of these elements.

a. chromium
b. manganese
c. iron
3. write the symbol for the ion formed when each element gains electrons and attains a noble-gas electron configuration.

a. br
b. h
c. as
d. se
4.* write electron configurations for the following atoms and ions, and comment on the result.

ar
cl − cap cl to the minus
s 2 − cap s super 2 minus end super
p 3 −

Which produce would best increase the amount of heat energy that is actually gained by calorimeter b

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

The ozone molecule o3 has a permanent dipole moment of 1.8×10−30 cm. although the molecule is very slightly bent-which is why it has a dipole moment-it can be modeled as a uniform rod of length 2.5×10−10 m with the dipole moment perpendicular to the axis of the rod. suppose an ozone molecule is in a 8000 n/c uniform electric field. in equilibrium, the dipole moment is aligned with the electric field. but if the molecule is rotated by a small angle and released, it will oscillate back and forth in simple harmonic motion. what is the frequency f of oscillation?