The density of this material is approximately

≈ 2.7 g/cm³

Explanation:

Using the density formula:

d = m/v

Find a point that is as closely intersected as it can be, like (10, 27) or (13, 35). Then, plug in the values to the density formula:

d = 27/10

d ≈ 2.7

So, the density is approximately 2.7 g/cm³.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.