An atom of an element has 17 proton, 17 electrons, and 18 neutrons. (i) Calculate the mass number of the element. (ii) Write its electronic configuration. (iii) Find the valency and an atomic number of the element.

Question

Philoid · Accepted Answer

The number of electrons in an atom of element = 17

The number of protons in the atom = 17

Number of the neutron in the atom = 18

(i) Mass number of the element = (protons + neutrons)

= 17 + 18 = 35

(ii) Electronic configuration is 2, 8, 7

(iii) Valency of the element is 1

The atomic number is 17

An atom of an element has 17 proton, 17 electrons, and 18 neutrons.(i) Calculate the mass number of the element.(ii) Write its electronic configuration.(iii) Find the valency and an atomic number of the element.

An atom of an element has 17 proton, 17 electrons, and 18 neutrons.
(i) Calculate the mass number of the element.

(ii) Write its electronic configuration.

(iii) Find the valency and an atomic number of the element.