3 The atom of an element is written as 23 X 11
1) What does the figure 11 indicate ?
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Answer:
Atomic number
Explanation:
The element is sodium
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The atomic number of the element is 11. Hence it contains 11 protons and 11 electrons since the element is neutral. Its mass number is 23 and hence it contains (23-11) = 12 neutrons.
Explanation:
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