How many electrons does calcium need to get eight valence electrons?

What is the scinecetific word for al2o3? Are space heaters energy efficient? What is the definition of endurance strength? How does is protect the seed? What is a merchalli scale? What texture does the raising agents give? Can you change the time of your last edit on prezi? What are natural resources that we use everyday? How is halite mined and processed? What is water tumbler? Does the human male prostate get bigger as he grows? What cities lie south of 0 degrees latitude? How do you calculate mass of molecules? How do macadamia nuts get their chemical potential energy? What conditions on earth allowed us to survive? What is disadvantages of pbr322 plasmid? What the excretory system of a digenetic trematode with diagram? Which type of soil do bean plants grow the best in? Is burning salt a characteristic property? Is a scarlet macaw an omnivore?