Question

When is zero considered significant​

Answer 1

Answer:

The trailing zero to the right in the decimal place and the zero present between the non zero digit are significant.

Explanation:

The rules which describes about the significant digits are discussed below as:

• All the digits which are non zero are significant. Example 178 has three significant digits.

• The zero which is present in between two non zero digits are consider significant. Example 507 has 3 significant digits.

• The leading zeroes are not consider significant. Example 0.00676 has 3 significant digits only.

• Trailing zero to the right in the decimal is consider significant. Example 3.0 has 2 significant digits.

• Trailing zero which is present in the whole number without any decimal are not significant. Example 9800 has only 2 significant digit.

Answer 2

If a zero is found between significant digits, it is significant. Zeros can be used as (insignificant) place holders to the left of significant digits if the number is a decimal. For example, a mass of 42 g has two significant digits. Expressed in kilograms, the mass of 0.042kg should still have two significant digits.