Which of these elements has the shortest distance from the center of the nucleus to the outermost valence electron?

Hydrogen peroxide decomposes to water and oxygen via the following process: 2 H2O2 (l)

How many electrons of the same spin (same magnetic quantum number) can be contained in the set of orbitals pictured below?

An FM radio station broadcasts EM radiation at a frequency of 89.7 MHz. What is the wavelength of this radiation (in meters)?

Using the values in Table 1, calculate ∆Hºrxn for the following process: 3 Cl2 (g) + PH3 (g)

What volume of 0.250 M HNO3 is required to neutralize (completely react with) a solution prepared by dissolving 17.5 g of NaOH in water? (Hint: You’ll want to start by writing a balanced equation for the process)

A sample of iron absorbs 67.5 J of heat, upon which the temperature of the sample increases from 21.5ºC to 28.5 ºC. If the specific heat of iron is 0.450 J/g-K, what is the mass of the sample?

What is the maximum number of electrons that can be contained in the subshell pictured below?

When an electrical spark is applied to sodium azide (NaN3) in an automobile air bag, the NaN3 is rapidly converted into elemental sodium and nitrogen gas. What type of reaction is this?

The temperature of a 15 g sample of lead metal increases from 22 ºC to 37 ºC upon the addition of 29.0 J of heat. What is the specific heat of lead (in J/g-K)?