protons and electrons grouped together in a random pattern protons and electrons grouped together in an alternating pattern a core of protons and neutrons surrounded by electrons a core of electrons and neutrons surrounded by protons
Which of the following best describes an atom?

Options:
- protons and electrons grouped together in a random pattern
- protons and electrons grouped together in an alternating pattern
- a core of protons and neutrons surrounded by electrons
- a core of electrons and neutrons surrounded by protons

a core of protons and neutrons surrounded by electrons