An atom of copper has an atomic number of 29 and a mass number of 63 - Edexcel - GCSE Chemistry - Question 4 - 2015 - Paper 1
Question 4
An atom of copper has an atomic number of 29 and a mass number of 63.
(i) Complete the table to show the numbers of protons, neutrons and electrons in this atom of ... show full transcript
Worked Solution & Example Answer:An atom of copper has an atomic number of 29 and a mass number of 63 - Edexcel - GCSE Chemistry - Question 4 - 2015 - Paper 1
Step 1
Complete the table for protons
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Answer
The number of protons in an atom of copper is equal to its atomic number. Therefore, there are 29 protons.
Step 2
Complete the table for neutrons
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Answer
The number of neutrons can be calculated by subtracting the atomic number from the mass number.
Neutrons = Mass number - Atomic number = 63 - 29 = 34 neutrons.
Step 3
Complete the table for electrons
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Answer
In a neutral atom, the number of electrons is equal to the number of protons. Thus, there are 29 electrons.
