example
2. Write the uses of group l' and group
lind
elements
Answers
Answer:
alkali metalAny of the soft, light, reactive metals of Group 1 of the periodic table; lithium, sodium, potassium, rubidium, cesium, and francium. lyeA strong caustic alkaline solution of potassium or sodium salts, obtained by leaching wood ashes. It is much used in making soap as well as in biodiesel.
Answer:
Alkaline earth metals are shiny, soft or semi-soft metals that are insoluble in water. They are generally harder and less reactive than the metals in in group IA, such as sodium, and are softer and more reactive than the metals in group IIIA, such as aluminum. When they combine with oxides (molecules of oxygen plus another element) they make up some of the most common minerals on Earth, with a variety of uses in industry, medicine and consumer goods. Some compounds give off a great deal of light when heated, making them key ingredients in fireworks.
Explanation:
Chemistry of Group IIA
In compounds, alkaline earth metals lose two electrons, forming ions with a 2+ charge. They readily react with oxygen, which accepts electrons to form ions with a 2- charge. The positive and negative ions are attracted to each other, resulting in a bond that has a net charge of 0. The resulting compounds are called oxides. Solutions made from these oxides and water are bases with a pH greater than 7. The alkaline nature of these solutions provides this group of metals with its name. Alkaline earth metals are highly reactive, and the activity of these metals increases moving down the group. Calcium, strontium and barium can react with water at room temperature.