23 model paper

(a) Describe the Rutherford's model of an atom. State one drawback of Rutherford's model of the atom (b) The mass number of an element is 23 and it contains 11 electrons. What is the number of protons and neutrons in it ? What is the atomic number of the element ?

Discussion OF paper-2(question 16 to 23)

A sheet of paper 15 cm xx 23 cm is rolled along the 23 cm edge. The resulting shape will be:

Plot the following points on a graph paper (3,4) (ii) -2,3)(-5,-2)( iv) (4,-3)