Hydrogen is the only atom that does not
have __electrons in the 1st energy
level/ shell.

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

In apex! a liquid heated beyond a certain temperature becomes

If blood contains 150g of hemoglobin per liter of blood, how much hemoglobin would be contained in 10 ml of blood