A sodium atom can be shown as:
$$\frac{23}{11}Na$$
How many protons, neutrons and electrons are in a sodium atom?
A) 11 protons, 12 neutrons, 11 electrons
B) 11 protons, 11 neutrons, 12 electrons
C) 12 protons, 11 neutrons, 11 electrons
D) 12 protons, 11 neutrons, 11 electrons
Your answer: - OCR Gateway - GCSE Chemistry - Question 12 - 2019 - Paper 1
Question 12
A sodium atom can be shown as:
$$\frac{23}{11}Na$$
How many protons, neutrons and electrons are in a sodium atom?
A) 11 protons, 12 neutrons, 11 electrons
B) 11 ... show full transcript
Worked Solution & Example Answer:A sodium atom can be shown as:
$$\frac{23}{11}Na$$
How many protons, neutrons and electrons are in a sodium atom?
A) 11 protons, 12 neutrons, 11 electrons
B) 11 protons, 11 neutrons, 12 electrons
C) 12 protons, 11 neutrons, 11 electrons
D) 12 protons, 11 neutrons, 11 electrons
Your answer: - OCR Gateway - GCSE Chemistry - Question 12 - 2019 - Paper 1
Step 1
How many protons are in a sodium atom?
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Answer
A sodium atom has 11 protons. This is indicated by the atomic number, which is the lower number (11) in the notation 1123Na.
Step 2
How many neutrons are in a sodium atom?
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Answer
To calculate the number of neutrons, subtract the number of protons from the mass number: 23−11=12. Therefore, a sodium atom has 12 neutrons.
Step 3
How many electrons are in a sodium atom?
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Answer
In a neutral sodium atom, the number of electrons equals the number of protons. Hence, a sodium atom has 11 electrons.
Step 4
Final answer selection
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Answer
Based on the calculations above, the correct answer corresponds to option A: 11 protons, 12 neutrons, 11 electrons.
