Using the periodic table, which of the following elements has the most properties in common with calcium (ca)?

potassium (k)

magnesium (mg)

scandium (sc)

argon (ar)

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

The following reaction shows the products when sulfuric acid and aluminum hydroxide react. al(oh)3 + h2so4 → al2(so4)3 + h2o the table shows the calculated amounts of reactants and products when the reaction was conducted in a laboratory. sulfuric acid aluminum hydroxide initial amount of reactant 40 g 15 g theoretical yield of water from reactant 14.69 g 10.38 g what is the approximate amount of the leftover reactant? 11.73 g of sulfuric acid 10.33 g of sulfuric acid 11.12 g of aluminum hydroxide 13.67 g of aluminum hydroxide