According to table f, which compound is soluble in water?
(1) barium phosphate (3) silver iodide
(2) calcium sulfate (4) sodium perchlorate

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 2002, the rare earth elements mine in mountain pass, california was closed because

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space