A magnesium ion has 12 protons and a charge of 2 . how many electrons does it contain?

What layer of the atmosphere is directly above the troposphere?

How many atoms are there in 5.70 mol of mg

Write the formula for the following chemicals. 7. e. trinitrogen tetraoxide a calcium phosphate f. magnesium acetate b. potassium sulfide g nickel(iii) cyanide c carbon dioxide h. silver sulfate d. cobalt(ii) chloride