For the first question, (b) they all have the same number of protons is true for carbon, nitrogen, oxygen, and fluorine since they are all elements and the number of protons determines the element.
For the second question, (b) they all have the same number of protons is not true. Sodium, magnesium, aluminum, and potassium are different elements and therefore have different numbers of protons.
(1) Which of the following is true about the following atoms: carbon, nitrogen,oxygen and fluorine?
(a) they all have the same number of electrons.
(b) they all have the same number of protons.
(c) they all have the same number of neutrons.
(2) which of the following is true about the following atoms: sodium, magnesium, aluminum and potassium?
(a) they all have the same number of electrons.
(b) they all have the same number of protons.
(c) they all have the same number of neutrons.
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