Which unpunctuated sentence DOES NOT contain an introductory phrase or clause?

Select the sentence with a capitalization error.

Answer the question: What is the starting salary for a typical teacher in the US?  Justify your answer using the data. 

If you wish to spear a fish with a regular spear, you should compensate for refraction and throw your spear

If a neutral element has the following chemical symbol, how many electrons does it have?

Which of the following does not describe a nuclear fission reaction?

Relative to radio waves, the velocity of visible light waves in a vacuum is

Compared to the wavelength of incident light, diffuse reflection occurs when the size of the surface irregularities is

The distance between the Earth and Moon is 3.84 x 108 m. A pulse of laser light aimed at the Moon, traveling at 3.0 x 108 m/s, bounces back to Earth. What is the round-trip time in seconds of the laser light? (Round to two decimal places.)

Is the mass of an atomic nucleus greater than or less than the sum of the masses of the nucleons composing it? Why don’t the nucleon masses add up to the total nuclear mass?