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1. Differentiate mass number from atomic number.
The number of in an atom is known as its atomic number. It is denoted by the letter .
The mass number is defined as the total number of in an atom. It is denoted by the letter .
2. The atomic number of an element is 9, it has 10 neutrons. Find the element from the periodic table. What will be its mass number?
is a chemical element with the symbol F and atomic number \(9\) in the periodic table.
Fluorine mass number (A) = neutron (n) + proton (p) = (10 + 9).
Therefore the Mass number of Fluorine = .
Fluorine mass number (A) = neutron (n) + proton (p) = (10 + 9).
Therefore the Mass number of Fluorine = .
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