Answer:
Explanation:The only difference between these different types of radiation is their wavelength or frequency. Wavelength increases and frequency (as well as energy and temperature) decreases from gamma rays to radio waves.
There are 4 significant figures! Start counting after the first non-zero digit :)
Hope this helps.
Density is Mass divided by volume.
Explanation:
Percentage composition = 2/18 = 11.11%.
Here's an example of a bar graph.