Question

1) Atomic number of Phosphorus is 15 and mass number is 31. Draw the
structure of Phosphorus showing the composition of the nucleus as well as
distribution of electrons in different shell. Also comment on its valency.​
plzz help

Answer 1

The atomic number for any element is the number of protons in its atomic nuclei. In a neutral atom, the number of electrons are the same as the number of protons. The atomic mass (mass number) is the sum of the protons and neutrons in the nucleus. Mass number can vary due to the fact that the number of neutrons can vary. Isotopes are named for their mass numbers.

So, this element has 15 protons (atomic number), 15 electrons, and 16 neutrons (mass number minus atomic number).

This isotope is phosphorus-31, which has atomic number 15.

i hope help you

Answer 2

Answer:

please refer to the above attached image for the answer