An atom of beryllium consists of 4 protons, 5 neutrons, and 4 electrons. The mass number of this atom is
The mass number is the total of the number of protons and neutrons, which in this case is nine.
645 MCQ for effective preparation of the test of Basics of Chemistry section.
Read the MCQ statement: An atom of beryllium consists of 4 protons, 5 neutrons, and 4 electrons. The mass number of this atom is , keenly and apply the method you have learn through the video lessons for Basics to give the answer. Record your answer and check its correct answer and video explanation for MCQ No. 436-2622.