Express the product of 4.0 × 10-2 m and 8.1 × 102 m using the correct number of significant digits. a. 3.2 × 101 b. 3.24 × 101 c. 32.4 d. 30

The correct answer is option  C.

Explanation:

Significant figures : The figures in a number which express the value of the magnitude of a quantity to a specific degree of an accuracy is known as significant digits.

Using identity =

=

There are three significant figures in the answer. Hence, correct answer is option  C.

a electronegativity decreases beacuse the size of nucleus is bigger.