What is an isotope?
Isotopes - Practice

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Science
•
11th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons, resulting in different mass numbers.
2.
FLASHCARD QUESTION
Front
What does the 'A' in the isotope symbol represent?
Back
The 'A' represents the mass number, which is the total number of protons and neutrons in the nucleus of an atom.
3.
FLASHCARD QUESTION
Front
How do you determine the number of neutrons in an isotope?
Back
Subtract the atomic number (number of protons) from the mass number (A).
4.
FLASHCARD QUESTION
Front
What is the atomic number of an element?
Back
The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.
5.
FLASHCARD QUESTION
Front
What is the mass number of Lithium-7?
Back
The mass number of Lithium-7 is 7, which means it has 3 protons and 4 neutrons.
6.
FLASHCARD QUESTION
Front
Which isotope has 9 protons and 9 neutrons?
Back
Fluorine-18 has 9 protons and 9 neutrons.
7.
FLASHCARD QUESTION
Front
What is the significance of isotopes in chemistry?
Back
Isotopes are important in various applications, including radiometric dating, medical imaging, and nuclear energy.
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