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3 cards from this section. Quick, good the night before a test.
What is the charge of a proton?
Remember, what charge do protons hold?
Where are electrons located in an atom?
Think about their position relative to protons and neutrons.
What is the charge of an electron?
Remember the charge interactions.
True or False: Isotopes have different number of protons.
Review the definition of isotopes.
An atom has 12 protons and 12 neutrons. What is its atomic number and mass number? Are there any isotopes of this element?
Remember that atomic number is only about protons.
If an element has a mass number of 20 and an atomic number of 8, how many neutrons does it have?
Use the relationship between atomic number and mass number.
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