Question

question 15 of 20 : select the best answer for the question. 15. which statement gives you enough information to say that the atom is electrically neutral? a. the atom has 7 protons and 7 electrons. b. the atom has 4 neutrons and 4 protons. c. the atom has 19 electrons and 19 neutrons. d. the atom has 15 neutrons and 15 electrons. mark for review (will be highlighted on the review page) << previous question next question >>

Explanation:

To determine if an atom is electrically neutral, the number of protons (positive charge) must equal the number of electrons (negative charge). Neutrons have no charge and do not affect the electrical neutrality.

• Option A: 7 protons (positive) and 7 electrons (negative) → equal charges, so neutral.
• Option B: Compares neutrons (no charge) and protons (positive) → does not relate to electron - proton balance.
• Option C: Compares electrons (negative) and neutrons (no charge) → does not relate to proton - electron balance.
• Option D: Compares neutrons (no charge) and electrons (negative) → does not relate to proton - electron balance.

Answer:

A. The atom has 7 protons and 7 electrons.