13. magnesium is commonly extracted from seawater. the table below shows the
isotopes of magnesium that are extracted.
isotopes of calcium
isotope
percent abundance mass
calcium -39
22.70%
39 amu
calcium -40
75.08%
40 amu
calcium-41
2.22%
41 amu
what is the average atomic mass of calcium?

is the answers your welcome! : )

Large asteroid and comet impacts. because they can have a huge impact on the environment, such as a loss of land, and crust on the earth with the big holes they produce. on the other hand, volcanic eruptions can also cause change within the environment by producing land, but im actually not quite sure which one would be a better answer, hopefully you read this and didnt just flat out choose the first sentence i have spoken! your welcome~

Answernon electrolyte;