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An element M has atomic mass 19 and ato...

An element M has atomic mass 19 and atomic number 9 . Its ion is represented as

A

`M^(+)`

B

M

C

`M^(-)`

D

`M^(2-)`

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The correct Answer is:
C
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An element M has an atomic mass 19 and atomic number 9 . Its ion is represented by

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(a) What is mean by (i) atomic number, and (ii) mass number, of an element ? Explain with the help of an example (b) What is the relation between the atomic number and mass number of an element ? (c) If an element M has mass number 24 and atomic number 12, how many neutrons does its atom contain ?

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