Practice What Is An Atom? (4.2) - Atomic Structure

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6 sample questions

Question 1.
What is the definition of an atom?
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Think about the basic unit of something.
Question 2.
Who discovered the electron?
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Remember his famous cathode ray experiment.
3Question 3.
What is the charge of an electron?
- Positive
- Negative
- Neutral
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Think about the opposite charge to protons.
4Question 4.
True or False: The atomic number equals the number of neutrons.
- True
- False
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Remember the definition of atomic number.
Question 5.
A neutral atom has 10 protons and 10 electrons. If it gains 2 electrons, what is its new charge and how does that affect its chemical behavior?
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Think about how gaining electrons affects overall charge.
Question 6.
If you find an element with 6 protons and 8 neutrons, what is its mass number and how many isotopes could this element potentially have?
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Consider how neutrons vary among isotopes.

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