Element	Electron Configuration/Emission Spectrum	Common Compound(s)/Application(s)
1 Hydrogen (H)		Water (H2O)/Ubiquity Acid/Increasing H+ in Solvent Base/Increasing OH- in Solvent ~/Stars' Burning Fuel
3 Lithium (Li)		~ Hydroxide (LiOH)/Soap ~ Carbonate (Li2CO3)/Industrial App. ~/Batteries, Heat-transfer Material, Thermal Nuclear Bomb
11 Sodium (Na)		~ Chloride (NaCl)/Table Salt ~ Hydroxide (NaOH)/Common Base ~/Heat-transfer Material, Reducing Agent1
19 Potassium (K)		~ Carbonate (K2CO3)/Fertilizer (Potash) ~ Sulfate (K2SO4)/Fertilizer (Potash) ~ Chloride (KCl)/Salt Substitute ~/Nervous Signal Transmission
37 Rubidium (Rb)		~/Cheap Atomic Clock, Interacting with unwanted gas to attain high vacuum (Getter)
55 Cesium (Cs)		~ Iodide (CsI)/Radiation Detector ~/Atomic Clock, Getter
87 Francium (Fr)		All its 30 known isotopes are radioactive, the one exists in nature has a half-life of 21 min. It is estimated that the Earth's crust contains less than one ounce of the substance

Group 1 Elements

¹Reduction can be defined as the "loss of oxygen". For example, rust (oxide of iron or Fe₂O₃) can be reduced back to iron in blast furance via the reaction: 2Fe₂O₃ + 3C 4Fe + 3CO₂ and Fe₂O₃ + 3CO 2Fe + 3CO₂. The carbon (coke - a fairly pure form of carbon) is the reducing agent, which is being oxidized in the process. Thus, another definition for reduction is to gain electron(s) by the atom; while oxidation is the loss of electron(s) from the atom. Note that the number of electrons associated with the oxygen atom remains the same, there is no loss or gain - it only oxidizes different atoms in the process.