General Chemistry: Atomic Structure
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What three subatomic particles make up an atom?
Protons, neutrons, and electrons.
What determines an element’s atomic number?
The number of protons in the nucleus.
What charge does a proton carry?
A positive (+1) charge.
What charge does an electron carry?
A negative (−1) charge.
Where are electrons located in an atom?
In orbitals (energy levels) surrounding the nucleus.
What is an isotope?
Atoms of the same element with the same number of protons but different numbers of neutrons.
What is the mass number of an atom?
The total number of protons plus neutrons.
What is a cation?
A positively charged ion formed by losing electrons.
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