The atom of an element X contains 17 protons, 17 electrons and 18 neutrons whereas the atom of an element Y contains 11 protons, 11 electrons and 12 neutrons.
(a) What type of ion will be formed by an atom of element X? Write the symbol of ion formed.
(b) What will be the number of (i) protons (ii) electrons, and (iii) neutrons, in the ion formed from X?
(c) What type of ion will be formed by an atom of element Y? Write the symbol of ion formed.
(d) What will be the number of (i) protons (ii) electrons, and (iii) neutrons, in the ion formed from Y?
(e) What is the atomic mas of (i) X, and (ii) Y?
(f) What could the elements X and Y be?
(a). Anion will be formed by element X; Symbol: X-
(b) (i). No. of protons in X = 17
(ii) No. of electrons in X = 18
(iii) No. of neutrons in X = 18
(c) Cation will be formed by element Y; Symbol: Y+
(d) (i). No. of protons in Y = 11
(ii) No. of electrons in Y = 10
(iii) No. of neutrons in Y = 12
(e) Atomic mass of X = No. of protons (17) + No. of neutrons (18) = 35 u
Atomic mass of Y = No. of protons (11) + No. of neutrons (12) = 23 u
(f) Element X is Chlorine (Cl).
Element Y is Sodium (Na).