Study the data given below answer the qusestion which follow:

(i) write the mass number and atomic number of the particles A,B,C and D.
(ii) Which repersent a pair of isotopes?

Study the table and answer the questions given below a. Write down the atomic number and mass number of each element. b. Identify elements X and Y.

Explain the following : (i) mass number , (ii) atomic number and (iii) isotopes .

If a radioactive element emits - (i) alpha -particle and (ii) beta -particle, then how its mass number and atomic number will change?

Direction: Study the data carefully and answer the following questions. Following is the data given of selling of 5 shops A, B, C, D and E of two different types of books. Find the difference between number of fiction books sold from shop B to number of comic books sold from shop D.

Each of the questions below consists of a question and two statements numbered I and II given below it. You have to decide whether the data provided in the statement are sufficient to answer the question . Read both the statements and answer the questions. Among A,B,C and D , which school has the highest number of students. I. School A has fewer students than school D. II. School C has fewer students than school D.

Write in pairs, equal number of atoms from those given below:

Write in pairs, equal number of atoms from those given below:

Direction: Study the data carefully and answer the following questions. Following is the data given of selling 2 types of pizza from 4 shops A, B, C and D. in each of the following number series, the wrong number is given, find out that number. 87, 88, 84, 110, 95, 220

Study the following figure and answer the questions given below. By which number, the trained unmarried lecturers in the college are represented? A. 6 B. 5 C. 7 D. 4

Study the following figure and answer the questions given below. By which number, the trained married lecturers in the college are represented? 1 A. 7 B. 6 C. 5 D. 4