The characteristics of a substance that can be observed without changing it into another substance are called?

Table sugar completely dissolved in water is an example of a?

Scientists often have to deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each number in an alternate form.

How are isotopes of the same element alike?