What volume of hydrogen gas (at STP) is produced if 34.3 g of potassium (K) metal reacts with water according to the chemical equation 2K(s) + 2H2000 > 2 KOH(aq) + H2(9)

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?

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?