PDF chapter test TRY NOW
1. In the notation of the symbol , if Z \(=\) 15 and A \(=\) 30, (i) find the number of neutrons in the atom and (ii) identify the element X.
Answer:
(i)
(ii) The element is .
2. Calculate the mass number of an element with atomic number 18 and has 13 neutrons.
Answer:
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