What is the atomic number and mass number of X in X 17 35 ?

The mass number of the atom is the sum of number of neutrons and protons present in side the nucleus of an atom and atomic number is the number of protons present in an atom. Atomic number of X is 17 and mass number of X is 35 .

Give the electronic configuration of element X in X 17 35 .

Electronic configuration is the distribution of electrons in the various energy levels or shells in an atom. The element has atomic number 17 . Thus, the electronic configuration of element is, 2 , 8 , 7 .

How many valence electrons are present in X 17 35 ?

Valence electrons are the number of electrons present in the outermost shell of the atom of an element. An atom lose or gain valence electrons to attain the nearest noble gas configuration. The electronic configuration of element X is 2 , 8 , 7 . The element X has 7 valence electrons.

Identify element X and its actual mass number in X 17 35 ? Give reason for your answer.

The element X is Chlorine. About three quarters of all chlorine atoms have 18 neutrons, giving those atoms a mass number of 35 . About one quarter of all chlorine atoms have 20 neutrons, giving those atoms a mass number of 37 . By, arithmetic average of the precise atomic masses, we would get 36 . 34 . 969 + 36 . 966 2 = 35 . 968 amu