An atom with fewer neutrons than protons and more electrons than protons is classified as a negative ion, or an anion. In such cases, the imbalance results in an overall negative charge due to the excess of negatively charged electrons. Therefore, the correct choice is D. negative ion .
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An atom with fewer neutrons than protons and more electrons than protons is a negative ion, which is known as an anion. This occurs due to the imbalance in the number of protons and electrons, resulting in a negative overall charge. For example, an atom with 5 protons and 6 electrons would be negatively charged. ;