Which statement about phosphorus is correct?
Use the Periodic Table to help you answer this question - OCR Gateway - GCSE Chemistry: Combined Science - Question 2 - 2018 - Paper 1
Question 2
Which statement about phosphorus is correct?
Use the Periodic Table to help you answer this question.
A A phosphorus atom has 15 protons and 16 electrons.
B The... show full transcript
Worked Solution & Example Answer:Which statement about phosphorus is correct?
Use the Periodic Table to help you answer this question - OCR Gateway - GCSE Chemistry: Combined Science - Question 2 - 2018 - Paper 1
Step 1
A A phosphorus atom has 15 protons and 16 electrons.
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Answer
This statement is incorrect. A neutral phosphorus atom has 15 protons and also 15 electrons.
Step 2
B The phosphorus-31 isotope has 16 neutrons.
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Answer
This statement is correct. The atomic mass of phosphorus-31 is 31, and with 15 protons, it has 31 - 15 = 16 neutrons.
Step 3
C Phosphorus is a metal.
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Answer
This statement is incorrect. Phosphorus is a non-metal, found in Group 15 of the Periodic Table.
Step 4
D The symbol for phosphorus is Po.
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Answer
This statement is incorrect. The symbol for phosphorus is P, while Po is the symbol for polonium.
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