Multiple Choice
How many atoms are contained in 0.230 g of sodium, Na? The mass of one sodium atom is 22.99 amu.
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4. Atoms and Elements
Subatomic Particles (Simplified)
Multiple Choice
In a neutral atom, which subatomic particles carry a positive charge?
A
Photons
B
Neutrons
C
Electrons
D
Protons
Verified step by step guidance1
Recall the three main subatomic particles found in an atom: protons, neutrons, and electrons.
Understand the charge associated with each particle: protons carry a positive charge, electrons carry a negative charge, and neutrons have no charge (they are neutral).
Since the atom is neutral overall, the number of protons (positive charges) equals the number of electrons (negative charges), balancing the charge.
Identify that photons are not subatomic particles within the atom; they are particles of light and do not carry charge related to atomic structure.
Conclude that the subatomic particles carrying a positive charge in a neutral atom are the protons.
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