Which element has the ground state electron configuration of 1s22s22p63s23p4?

Bonus question Rank the following in order of decreasing importance as a contributing resonance structure to the molecular structure of acetone, CH3COCH3 (more important > less important)

Identify the following compound expected to be the most soluble in butane, CH3CH2CH2CH3?

Rank the indicated protons in order of increasing acidity.

What is the electronic configuration for the nitride ion?

Which is the correct Lewis structure for acetic acid (CH3CO2H)?  

A lookup table is a type of dictionary.

What would be the output if you were to print the variable named value as declared by this statement: value = “2” + “2”?

What is the lambda function in Python utilized for?

In a recursive function, what is used to determine whether to stop or to continue with another recursive step?