Answer : The number of marbles lined up across the circumference of the earth can be, 
marbles
Explanation :
First we have to calculate the diameter of tiny marble.
r = radius of marble = 0.25 mm
Now we have to calculate the number of marbles can be lined up across the circumference of the earth.
Given:
Circumference of the earth distance = 
conversion used: 
Number of marbles can be lined up = 
marbles
Thus, the number of marbles lined up across the circumference of the earth can be, marbles
Answer:
the answer is cobalt and chloride
We can say that when performing qualitative tests, one should take notes regarding the measurements of the substance or the observations being made regarding the morphology of cells.
<h3>What are qualitative tests?</h3>
This is a type of test that helps scientists measure is a substance is present or not, as well as morphological characteristics of cells in the case of the experiment being biological in nature. In these cases, we should write down any information regarding measurements of the substance we are searching for, or in the case of cells, any morphological characteristics that can be observed.
Therefore, we can confirm that when performing qualitative tests, one should take notes regarding the measurements of the substance or the observations being made regarding the morphology of cells.
To learn more about qualitative tests visit: brainly.com/question/5949851?referrer=searchResults
The name of the element whose third shell has 2p electrons is neon.
