Which of the following electron configuration represents an alkaline earth metal

[he]2s1
[ar]4s23p6
[ne]3s22p4
[ne]3s2

Which feature do highland climates have that lower elevation areas do not?

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

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?