What makes every element different from the next? The number of neutrons around the nucleus
The number of electrons in the nucleus
The number of protons in the nucleus
None of the above

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Part a constants huck finn walks at a speed of 0.60 m/s across his raft (that is, he walks perpendicular to the raft's motion what is huck's velocity (speed and direction) relative to the river bank? express your answer to three significant figures and include the appropriate units. relative to the shore)

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?