12). Give three (3) assumptions /postulates of the Bohr's model of the atom (3 marks) ....... ............... 13) Calculate the energy of an electron in the 2^nd shell of the hydrogen atom (2 marks) . ....... __ 14). With two examples define the term polymorphism (3 marks).............................................................................. IIIIII ...11111 ..... 15). Solids imperfections are generally classified into four divisions namely (4 marks)

Question

12). Give three (3) assumptions /postulates of the Bohr's model of the atom (3 marks) ....... ............... 13) Calculate the energy of an electron in the 2^nd shell of the hydrogen atom (2 marks) . ....... __ 14). With two examples define the term polymorphism (3 marks).............................................................................. IIIIII ...11111 ..... 15). Solids imperfections are generally classified into four divisions namely (4 marks)

Answer 1

12) Three assumptions/postulates of the Bohr's model of the atom are:- The electron in an atom is in a stable orbit around the nucleus and does not emit or absorb radiation.- The energy of an electron in an atom is quantized and can only take on specific discrete values.- The energy of an electron in an atom is inversely proportional to the square of the distance between the electron and the nucleus.13) The energy of an electron in the 2nd shell of a hydrogen atom can be calculated using the formula:E = -13.6/n^2where n is the shell number. For the 2nd shell, n = 2, so:E = -13.6/2^2E = -3.4 eV14) Polymorphism refers to the ability of a single object or software to be in multiple forms or states. Two examples of polymorphism are:- A square and a rectangle are both examples of polymorphism because they are both types of quadrilaterals, even though they have different properties and behaviors.- A car and a truck are both examples of polymorphism because they are both types of vehicles, even though they have different properties and behaviors.15) Solids imperfections are generally classified into four divisions, namely:- Point defects: These are imperfections that involve a single atom or ion, such as vacancies, interstitials, or substitutional impurities.- Line defects: These are imperfections that involve a line or row of atoms, such as dislocations or grain boundaries.- Planar defects: These are imperfections that involve a plane or surface of atoms, such as stacking faults or twin boundaries.- Volume defects: These are imperfections that involve a large volume of atoms, such as voids or inclusions.

Question

Answer

Answer