Exam code: 5070
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2.3 Isotopes
Cobalt is an element in Period 4 of the Periodic Table.
Use your copy of the Periodic Table to help you complete the table below.
particle | number of protons | number of neutrons | number of electrons |
Co |
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Co2+ |
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60Co is an isotope.
i) Explain the term isotope.
[2]
ii) Explain why two isotopes of the same element have identical chemical properties.
[1]
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Chlorine is in Group VII of the Periodic Table.
Two isotopes of chlorine are chlorine‑35 and chlorine‑37
State why these two isotopes of chlorine have the same chemical properties.
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Chlorine is in Group VII of the Periodic Table.
Two isotopes of chlorine are chlorine‑35 and chlorine‑37.
Complete the table to show the number of electrons, neutrons and protons in each atom and ion.
| number of electrons | number of neutrons | number of protons |
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, and are isotopes of sodium.
Describe how these sodium isotopes are the same and how they are different in terms of the total number of protons, neutrons and electrons in each.
same:
different:
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, and are isotopes of sodium.
Why do all three isotopes have an overall charge of zero?
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