Multiple Choice
In the simplified atomic model, what do all atoms of the same element have in common?
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4. Atoms and Elements
The Atom (Simplified)
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Which statement best describes an atom?
A
A mixture of two or more substances that can be separated by physical means
B
The smallest unit of an element that retains the chemical identity of that element, consisting of a nucleus (protons and neutrons) with electrons surrounding it
C
A positively charged particle found in the nucleus of an element
D
A substance made of two or more different elements chemically bonded in fixed ratios
Verified step by step guidance1
Understand that the question asks for the best description of an atom, which is a fundamental concept in chemistry.
Recall that an atom is the smallest unit of an element that retains the chemical properties of that element.
Recognize that an atom consists of a nucleus containing protons and neutrons, with electrons orbiting around the nucleus.
Compare the given options to this definition: the correct description should mention the smallest unit of an element with a nucleus and electrons.
Eliminate options that describe mixtures, particles alone (like just protons), or compounds made of multiple elements, as these do not define an atom.
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