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Q.

What is the atomic symbol for isotopes with the following characteristics: 15 protons and 16 neutrons?

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a

b

c

d

answer is A.

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Detailed Solution

Concept- The atomic number of the element can be determined by dividing the number of protons by the number of electrons. As a result, the element has 15 protons, which gives it a 15-positive charge. The atomic number is 15, as there will be 15 electrons available to balance it.
Phosphorus is the element with atomic number 15 in the periodic table.
The number of protons and neutrons must now be added in order to determine the element's mass number. Since there are 16 neutrons in the given number, the mass will be:
Number of mass = 16 + 15 = 31
31 is the mass number.
Thus the symbol of the isotope can be written as

.
Hence, the correct answer is option (1).

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What is the atomic symbol for isotopes with the following characteristics: 15 protons and 16 neutrons?