Question

Draw the atomic diagram of the following element showing the distribution of – protons, neutrons and the electrons in the various shell of the atom.

Argon – \[\ce{^40_18Ar}\]

[The upper number represent the – mass number and the lower number represent the – atomic number e.g. calcium – mass number = 40, atomic number = 20]

Answer 1

Argon – \[\ce{^40_18Ar}\]
Atomic number Z = p = e = 15
Mass number    A = p + n
                         40 = 18 + n
                       ∴ n = 40 − 18 = 22
     Ar
15 = 2, 8, 8
        (K, L, M)