Group 1 The Alkali Metals - AP Chemistry
2019-2-18 · Group 1 The Alkali Metals. Lithium is soft enough to be cut with a knife, though this is more difficult than cutting sodium. The fresh metal has a silvery-white color which only remains untarnished in dry air. Lithium has about half the density of water, giving solid sticks of lithium metal the odd heft of a light-to-medium wood like pine.