What is the energy level of an electron in the eigth level of hydrogen ___j?​

Which of the following mining methods disrupts the sea floor?

Using the periodic table, complete the table to describe each atom. type in your answers.a ? b? c? d? e? f?

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?