Which of newton's laws accounts for the following statement?
"a force is required to cause motion to deviate from a straight line."

first, second, or third law?

The correct answer is Newton's first law.

Explanation:

Newton's first law of motion states that an object remains at rest or in motion until and unless an external force is applied on it.

In the question, it is given that a force is required to cause an object to deviate from a straight line. This means that an external force is provided to the object to deviate its path. And hence, this phenomena is caused by Newton's First law.

Hence, the correct answer is Newton's first law.

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.