Question

An isotopes of phosphorus contains 19 neutrons construct the symbol for the isotopes .what the mass number and what’s the atomic number

Answer 1

The mass number of the isotopes of phosphorus containing 19 neutrons is 34, and the atomic number remains 15.

Step-by-step explanation:

Isotopes are different forms of the same element that have the same number of protons, but a different number of neutrons. In the case of phosphorus, if an isotope contains 19 neutrons, the mass number would be 34 (15 protons + 19 neutrons). The atomic number for phosphorus remains the same, which is 15, indicating the number of protons.

Answer 2

Given,

The number of the neutrons in the isotope, N=19

The atomic number of phosphorous is Z=15.

Thus the atomic mass number is the sum of the protons and the neutrons in the atom.

Thus the mass number of the phosphorous-19 is

`A=Z+N`

That is,

`\begin{gathered} A=15+19 \\ =34 \end{gathered}`

Thus the symbol of the phosphorus-19 is

`^(34)_(15)P`