Multiple Choice
Which subatomic particles are found in the center of the atom (the nucleus)?
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4. Atoms and Elements
Subatomic Particles (Simplified)
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Which element is neutral if it has 56 electrons?
A
Cesium (Cs)
B
Xenon (Xe)
C
Iron (Fe)
D
Barium (Ba)
Verified step by step guidance1
Recall that a neutral atom has an equal number of protons and electrons. Therefore, the number of electrons in a neutral atom equals its atomic number.
Identify the atomic number of each element given in the options. The atomic number corresponds to the number of protons (and electrons in a neutral atom).
Look up the atomic number for Cesium (Cs), Xenon (Xe), Iron (Fe), and Barium (Ba) on the periodic table.
Compare the atomic numbers to the given number of electrons, which is 56, to find which element has an atomic number of 56.
The element whose atomic number matches 56 is the neutral element with 56 electrons.
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