Multiple Choice
Carbon-12 and carbon-13 are isotopes of carbon. Which of the following statements is correct?
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2. Atoms & Elements
Isotopes
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What are the atomic number and mass number for the carbon isotope with seven neutrons?
A
Atomic number 6, mass number 13
B
Atomic number 6, mass number 12
C
Atomic number 7, mass number 13
D
Atomic number 7, mass number 14
Verified step by step guidance1
Understand the concept of isotopes: Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.
Identify the atomic number: The atomic number is the number of protons in an atom. For carbon, the atomic number is 6, which means it has 6 protons.
Determine the number of neutrons: The problem states that the carbon isotope has seven neutrons.
Calculate the mass number: The mass number is the sum of protons and neutrons in the nucleus. Use the formula:
Substitute the values: Substitute the atomic number (6) and the number of neutrons (7) into the formula to find the mass number.
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