Question

Q: A Short Note on Alkali metal , Alkaline Earth Metals and Halogens ?
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Answer 1

Answer:

The alkaline earth metals are named after their oxides, the alkaline earths, whose old-fashioned names were beryllia, magnesia, lime, strontia, and baryta. ... "Earth" was a term applied by early chemists to nonmetallic substances that are insoluble in water and resistant to heating—properties shared by these oxides.

Answer 2

Answer:

1. Alkali metal, any of the six chemical elements that make up Group 1 (Ia) of the periodic table—namely, lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). The alkali metals are so called because reaction with water forms alkalies (i.e., strong bases capable of neutralizing acids)
2. The alkaline earth metals are six chemical elements in group 2 of the periodic table. They are beryllium, magnesium, calcium, strontium, barium, and radium. The elements have very similar properties: they are all shiny, silvery-white, somewhat reactive metals at standard temperature and pressure.
3. Metals are opaque, lustrous elements that are good conductors of heat and electricity. Most metals are malleable and ductile and are, in general, denser than the other elemental substances
4. The halogens are a group in the periodic table consisting of five chemically related elements: fluorine, chlorine, bromine, iodine (I), and astatine. The artificially created element 117, tennessine, may also be a halogen. In the modern IUPAC nomenclature, this group is known as group 17.

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