Lithium, Sodium, Potassium, Rubidium, Cesium

1 Group l A (1). Lithium, Sodium, Potassium, Rubidium, Cesium 

All the dialkali monosulfides are soluble in water and give alkaline solutions. The tellurides are instantly decomposed by air. They are soluble in water, but the solutions are easily oxidized to red polytellurides. The alkali metal tellurides are strong reducing agents which reduce tellurites to metallic tellurium. 

Most commonly available alkali metal chalcogenides  

2 Group 11A (2). Beryllium, Magnesium, Calcium, Strontium, Barium 

The monosulfides of the alkaline earth metals crystallize in the rock salt (MgS, CaS, SrS, BaS) and zinc blende (BeS) structures. BaS is insoluble in water, while the other monosulfides are sparingly soluble but hydrolyzed on warming (except MgS that is completely hydrolyzed). The monoselenides are isomorphous to the sulfides. The monotellurides CaTe, SrTe, BaTe adopt the rock salt stmcture, while BeTe has the zinc blende and MgTe the wurtzite structure. Alkaline earth polysulfides may be prepared by boiling a solution or suspension of the metal hydroxide with sulfur, e.g., 

---

The six elements adjacent to and following the six inert gases are lithium, sodium, potassium, rubidium, cesium, and francium. These elements have similar chemistries and are called the... 

PROPERTY LITHIUM SODIUM POTASSIUM RUBIDIUM CESIUM... 

Alkali metals lithium, sodium, potassium, rubidium, cesium, and francium. Metals such as sodium and potassium (the alkali metals) react violently with water—too violently to conduct experiments. The group 2 metals (also called alkaline earth metals) react less readily and can be used in the laboratory. Alkaline earth metals, including beryllium, magnesium, calcium, strontium, barium, and radium. 

Alkali metals lithium, sodium, potassium, rubidium, cesium, francium. 

Hydrogen Lithium Sodium Potassium Rubidium Cesium Francium... 

The alkali earth metals form Group 1 of the periodic table, made up of lithium, sodium, potassium, rubidium, cesium, and francium (not shown in Fig. 1.3). Their name derives from the observation that their addition to water generates an alkaline solution. They are all low density, soft, and extremely reactive metals, which are rarely found in their metallic form. This group has properties which are closer and more alike than any other group of the periodic table. Since they desperately want to lose their solitary outer sphere electron, their reactions with almost any other species (including molecular oxygen) are violent and explosive. 

The alkali metals—lithium, sodium, potassium, rubidium, cesium, and francium—make up Group 1 of the periodic table. These metals are highly reactive. For example, if potassium is dropped into water, the reaction will transform potassium into potassium hydroxide and hydrogen gas. When these metals react with water, hydrogen gas is given off, and heat—often hot enough to create flames—can appear. The heat produced by the interaction is enough to liquefy the metal. 

ACETALDOXIME or -ACETAL-DOXIME (107-29-9) CjHjNO Flammable liquid. Forms explosive mixture with air [flash point 72 to 96°F/22 to 36°C]. Reacts violently with oxidizers. Capable of reacting as both a weak base and a weak acid. Decomposes on contact with acids, forming hydroxylamine and acetaldehyde. Forms explosive peroxides on contact with air, acids. Attacks various alkali metals (i.e., lithium, sodium, potassium, rubidium, cesium, firancium). When exposed to air forms unstable peroxides may explode or decompose violently during distillation. ACETAMIDE, W,A -DIMETHYL (127-19-5) C4H9NO Combustible liquid... 

ETHYLIDENE CHLORIDE or ETHYLIDENE DICHLORIDE or 1,1-ETHYLIDENE DICHLORIDE (75-34-3) C2H4CI2 Forms explosive mixture with air [explosion limits in air (vol %) 5.6 to 11.4 flash point 10°F/-12°C autoignition temp 856°F/458°C Fire Rating 3], Violent reaction with strong oxidizers, potassium powdered metals alkaline earth (barium, calcium, strontium sometime magnesium is included) and alkali metals (lithium, sodium, potassium, rubidium, cesium, and francium). Contact with strong caustics will cause... 

CHLORURE de VINYLIDENE (French) (75-35-4) Forms explosive mixture with air (-18°F/-28°C). Inhibitors such as the monomethyl ether or hydroquinone must be added to prevent polymerization. Readily forms explosive peroxides with air or contaminants (a white deposit may indicate the presence of explodable peroxides). Violent polymerization from heat or on contact with oxidizers, chlorosulfonic acid, nitric acid, or oleum or under the influence of oxygen, sunlight, copper, or aluminum. Violent reaction with alkali metals (lithium, sodium, potassium, rubidium, cesium, and francium). Incompatible with ozone. May cause an explosive reaction with trifluorochloroethylene above 356°F/180°C, perchlory fluoride above 212°F/100°C. May be corrosive or unstable in the presence of steel. 

---