Write the electronic configuration of an element whose mass number is 31 and atomic number is 15 . What is its valency?

Open in App

Solution

The atomic number is 15 therefore electronic configuration = (2,8,5)

It gains 3 electrons to fill it's last shell with octate structure(eight electrons in outer shell) .

Therefore it's valency = 3.

Suggest Corrections

Similar questions

Q. An element 'X' has mass number 35 and number of neutrons 18. Write atomic number and electronic configuration of 'X'. Also write group number, period number and valency of 'X'.

Q. (i) How do you calculate the possible valency of an element from the electronic configuration of its atoms?
(ii) Calculate the valency of element X whose atomic number is 9.

How can the valency of an element be determined if its electronic configuration is known? What will be the valency of an element of atomic number 9 (nine)?

Q. The atomic number of an element X is 16.
(a) Write down the electronic configuration of X.
(b) What will be the valency of X?

Write the electronic configuration of the element with atomic number 17. Indicate the valency of the element.

Join BYJU'S Learning Program

Write the electronic configuration of an element whose mass number is 31 and atomic number is 15 . What is its valency?

The atomic number is 15 therefore electronic configuration = (2,8,5) It gains 3 electrons to fill it's last shell with octate structure(eight electrons in outer shell) . Therefore it's valency = 3.

The atomic number is 15 therefore electronic configuration = (2,8,5)

It gains 3 electrons to fill it's last shell with octate structure(eight electrons in outer shell) .

Therefore it's valency = 3.