Which Statement About an Atom Is True

question 56

Multiple Choice

Which statement about an atom is true?

• A) Only protons contribute significantly to the atom's mass.
• B) Only neutrons contribute significantly to the atom's mass.
• C) Only electrons contribute significantly to the atom's mass.
• D) Both protons and neutrons together contribute significantly to the atom's mass.
• E) Both protons and electrons together contribute significantly to the atom's mass.