Structure of Atom

The Structure of Atom Worksheet-4

1. A particle X deflects towards negative plate in the presence of electric field. Identify the particle X?

(a) Neutron       (b) Electron      (c) X-ray            (d) Proton

2. Bohr’s atomic model couldn’t explain:

(a) The fine spectrum of hydrogen

(b) The spectra of single electron species

(c) The stability of atom

(d) Both (A) and (C)

The Structure of Atom Worksheet-5

1. An element X has the same mass number and atomic number. This element is

(a) Inert gas                                  (b) Hydrogen

(c) Alpha particle                         (d) Helium

2. John Dalton was the first to give us an idea about the structure of the atom.The main defect in Dalton’s atomic model is about

(a) Similarity of atoms of same element

(b) Differences in atoms of different elements

(c) Indivisibility of atom

(d) That atoms combine in small whole numbers

The Structure of Atom Worksheet-6

1. In which of the following pairs of shells, energy difference between two adjacent orbits is minimum?

(a) K, L               (b) L, M             (c) M, N             (d) N, O

2. Which among the following pairs have different number of valence electrons?

(a) Na⁺, Al⁺³     (b) P^–3, Ar        (c) Mg⁺², Ar      (d) O^–2, F^–