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Multiple Choice
The average oxygen atom has a mass number of 16 and an atomic number of 8. This means that the number of neutrons in this oxygen atom is:
A
24.
B
8.
C
16.
D
4.
E
2.
Verified step by step guidance
1
Understand the concept of atomic number and mass number: The atomic number represents the number of protons in an atom, while the mass number is the sum of protons and neutrons.
Identify the atomic number of oxygen: The atomic number of oxygen is given as 8, which means it has 8 protons.
Identify the mass number of oxygen: The mass number of oxygen is given as 16, which is the total number of protons and neutrons.
Calculate the number of neutrons: Use the formula \( \text{Number of neutrons} = \text{Mass number} - \text{Atomic number} \). Substitute the values: \( 16 - 8 \).
Determine the number of neutrons: Perform the subtraction to find the number of neutrons in the oxygen atom.