How is a rational number that is not an integer different from a rational number that is an integer?

Every integer is a rational number, since each integer n can be written in the form n/1. For example 5 = 5/1 and thus 5 is a rational number. However, numbers like 1/2, 45454737/2424242, and -3/7 are also rational, since they are fractions whose numerator and denominator are integers.

A rational number that IS an integer would be written as a whole number, such as 21 or 999 or -2058. A rational number that ISN’T an integer would have decimals, such as 9.75 or 18.44444, as integers are whole numbers.

Element 17 is chlorine it is a group 7 element(halogen) and belongs to period 3 of the periodic table