Explanation: Starting at the left side where the decimal is (because you start with a non-zero integer) the 2 and 5 are obviously significant. The first 0 is significant because it is between two non-zero integers, and the second is significant because it is at the end of the number (this only counts at the end of a decimal!!).
Of the groups of elements below, which are most likely to gain electrons to become anions? a. alkali metal b. boron group c. halogen d. transition metal