Figure 1 shows information about two isotopes of hydrogen, A and B - Edexcel - GCSE Chemistry - Question 1 - 2023 - Paper 1
Question 1
Figure 1 shows information about two isotopes of hydrogen, A and B.
Complete the table to show the number of subatomic particles in each isotope.
| isotopes | A | B... show full transcript
Worked Solution & Example Answer:Figure 1 shows information about two isotopes of hydrogen, A and B - Edexcel - GCSE Chemistry - Question 1 - 2023 - Paper 1
Step 1
Complete the table for isotopes A and B
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Answer
For isotope A:
Atomic number: 1
Mass number: 1
Number of protons: 1
Number of electrons: 1
Number of neutrons: 0
For isotope B:
Atomic number: 1
Mass number: 2
Number of protons: 1
Number of electrons: 1
Number of neutrons: 1
Step 2
Hydrogen gas and oxygen gas are used in a hydrogen-oxygen fuel cell.
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Answer
The voltage stays constant/stable at approximately 1.1 V for 60 minutes, indicating that the fuel cell is functioning consistently over this time span. After this period, the voltage drops to zero (0 V) during the time frame of 60-75 minutes.
