Which of the following best describes an atom?
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1 point
A protons and electrons grouped together in a random pattern
B protons and electrons grouped together in an alternating pattern
C a core of protons and neutrons surrounded by electrons
D a core of electrons and neutrons surrounded by protons
C a core of protons and neutrons surrounded by electrons
The correct answer is C: a core of protons and neutrons surrounded by electrons.
To determine the best description of an atom, we can break down each option and evaluate its accuracy.
Option A: "A protons and electrons grouped together in a random pattern"
This option is not a correct description of an atom because atoms have a specific organization of protons, neutrons, and electrons and are not randomly arranged.
Option B: "Protons and electrons grouped together in an alternating pattern"
Similar to option A, this option is also incorrect. Atoms do not have an alternating pattern of protons and electrons.
Option C: "A core of protons and neutrons surrounded by electrons"
This option accurately describes an atom. An atom consists of a small, dense nucleus composed of protons and neutrons at its core. Orbiting around the nucleus are electrons, which determine the atom's chemical behavior.
Option D: "A core of electrons and neutrons surrounded by protons"
This option is not an accurate description of an atom. The core of an atom is made up of protons and neutrons, not electrons.
Therefore, the correct answer is option C: "A core of protons and neutrons surrounded by electrons."