Practice Atomic Number, Mass Number, And Isotopes (3)

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9 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
How many protons does an atom of neon have?
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Look up the atomic number of neon.
Question 2.
What is the mass number of a carbon atom that has 6 protons and 6 neutrons?
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Add the number of protons and neutrons.
3Question 3.
What does the atomic number represent?
- Number of neutrons
- Number of protons
- Mass number
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It's unique to each element.
4Question 4.
Mass number is equal to:
- True
- False
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Think about the definition of mass number.
Question 5.
An isotope of oxygen has a mass number of 18 and an atomic number of 8. How many neutrons does this isotope have?
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Remember that the mass number is the sum of protons and neutrons.
Question 6.
If an element has 11 protons and 12 neutrons, identify its atomic number and mass number.
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Atomic number equals the number of protons.

5 more questions in this section. Enroll free to practise them all.