Introductory Chemistry: A Foundati...
Solutions
Introductory Chemistry: A Foundati...
Exercise 4.4 Give the symbol for the phosphorus atom (Z = 15) that contains 17 neutrons.
Interpretation:
The symbol for phosphorus atom which contains 17 neutrons should be determined.
Concept Introduction:
The general atomic symbol of an element is:
A Z X
Where A is mass number of an atom, Z is atomic number, and X is the atomic symbol of an element.
The number of protons of an atom is equal to the atomic number of an atom. For a neutral atom, the number of protons and neutrons are same whereas the mass number of an atom is total sum of number of protons and neutrons of an atom.
The general atomic symbol of an element is:
A Z X
Where A is mass number of an atom, Z is atomic number, and X is the atomic symbol of an element.
Since,
Atomic number = Number of protons
Mass number = Number of neutrons + number of protons
Number of neutrons = 17 and atomic number = 15 (given)
Using, atomic number = Number of protons:
The number of protons = 15...
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